A Mystery of Crepe Murder

I have a theory about crepe murder.  It’s just a theory, but hear me out.

First, I should share that the obsession with passing judgement over those who crepe murder, what we call the annual cutting back of Lagerstroemia, has made me pause over the years.  Why have we as an industry hitched our wagon to discouraging this practice when there are far worse problems out there that demand our attention? 

 
A classic example of crepe murder.  Note the one solitary branch left that had a bird nest in it.  Butcher one life, and save another I suppose.

A classic example of crepe murder. Note the one solitary branch left that had a bird nest in it. Butcher one life, and save another I suppose.

 

I’ve seen bumper stickers , I’ve seen email tag lines, and I’ve seen contests for the worst examples, all in an attempt to discourage the practice. But, I’d rather see a crepe myrtle cut back hard than see gas-fueled, water-hungry, manicured lawns; privet growing and sowing all over a back garden fence; or the blanket spraying of roadsides with herbicides or blanket spraying plants with insecticide without knowing what the pest is.

Sure, I agree that it is much nicer to see a towering crepe myrtle in its natural form not butchered back, and I teach my students so in class. 

How many crepe myrtles do you count?  Most of these haven’t been crepe murdered and allowed to reach their full form.

How many crepe myrtles do you count? Most of these haven’t been crepe murdered and allowed to reach their full form.

 
And, they don’t even have to bloom.  Look at this thing!  A mighty Lagerstroemia fauriei displays beautiful bark at the JC Raulston Arboretum.

And, they don’t even have to bloom. Look at this thing! A mighty Lagerstroemia fauriei displays beautiful bark at the JC Raulston Arboretum.

 

Sure, I agree that the practice can create plant health issues for this tree. Crepe myrtle bark scale hasn’t helped with that either. 

But, this species is a non-native, vigorous tree. If you’re not happy with how it has been cut back over the years, then cut it down and start all over again. It’s much harder to do that with an oak or a maple. In 10 years or so by thinning out the small branches, you’ll have a nice small-statured tree. I have corrected crepe murdered plants before, so I know it can be done.

Crepe murder is basically a form of pollarding, something that we horticulturists admire and revere in other species. Pollarding (and coppicing) are both practices that date back eons and have sustained humans in the past. And, that’s what I’ve been so curious about, the other species.  Why don’t we see them murdered?  Why aren’t we talking about magnolia mutilation or vitex vilifying? 

So, it’s a mystery to me. Why crepe myrtles? Really, I’m to believe that the reason crepe murder occurs is because crepe myrtles are the only species that people plant near their house and grow taller than they expect? Yea, right. Maybe they are murdered more because crepe myrtles bloom so well on new wood? Or, is it because crepe myrtles are planted everywhere in the south and so we are so aware of people committing this practice? Why crepe myrtles?


When traveling through Tennessee last week I saw a possible clue to this mystery. I noticed that virtually every crepe myrtle I saw had significant winter dieback from the February freeze of Winter Storm Uri.  The tops of the trees looked like claws all curled together, and the bottoms were flushing ample new growth in an attempt to regrow.

A row of crepe myrtles exhibiting branch dieback from the cold temperatures during Winter Storm Uri.

A row of crepe myrtles exhibiting branch dieback from the cold temperatures during Winter Storm Uri.

It looks like someone braided a bunch of dead branches together at the top in these crepe myrtles.

It looks like someone braided a bunch of dead branches together at the top in these crepe myrtles.

These crepe myrtles in my hometown were crepe murdered years ago.  I cut them to the ground, retrained them up as multi-trunk trees, and for years they’ve looked good.  But, now after Winter Storm Uri, they don’t look so hot up top.

These crepe myrtles in my hometown were crepe murdered years ago. I cut them to the ground, retrained them up as multi-trunk trees, and for years they’ve looked good. But, now after Winter Storm Uri, they don’t look so hot up top.

So, here’s my theory. I wonder if winter dieback partly resulted in the practice of crepe murder.  Hard winters killed plant tissue, people pruned them back, and then the practice just started to catch on as it became monkey see-monkey do? Perhaps it became part of the unconscious gardening calendar?  Even this year after the February freeze, I had to hack back some 30-year-old azaleas at my house to get rid of the deadwood and encourage them to regenerate.

If this past winter created these conditions, were there other cold spells that did the same? Back home in Tennessee, I frequently heard from gardeners how rough the winters of the 1980’s were, which you can read about here, here, and here. I even recall in my Master Gardener classes people commenting about how in Tennessee crepe myrtles used to not be very hardy above ground, but over the past 30-to-40 years of course with warmer winters they were better able to achieve their full form.

I really feel for people like my parents who have a lot of damage in their crepe myrtles.  I mean what is the homeowner supposed to do? We’ve been telling people for years don’t cut crepe myrtles back, or you are an imbecile.

Well, I’m here to say it’s ok if you prune these sickly-looking plants. It would take hours and hours to try to isolate all the deadwood in the trees; therefore, I believe they need to be cut down to a point and allowed to regrow. The new growth that flushes can then be trained up into a new tree-like form by removing the smallest branches. The University of Florida has a nice guide on how to prune crepe myrtles, and if you don’t feel comfortable doing it, then you can always hire a professional.

So, maybe winter damage has something to do with crepe murder, or maybe it’s a combination of factors. It is just a theory, but I hope this perspective gives you the courage to do something about your crepe myrtles if they ever look rough.

June at the JC Raulston Arboretum

This post is 6 of 12 of a series I’m doing this year reflecting back on some of my favorite plants from visiting the JC Raulston Arboretum while attending graduate school at NC State in Raleigh NC. Check back next month for more.

Ah, summer at the JC Raulston Arboretum. I loved how late I could be out at the garden photographing plants. And, in June I needed the extra time to fully appreciate the garden as there was so many plants in full bloom and offering interest in the garden. It had gotten warm enough that many plants were pushing toward their zenith as we reached the longest days of the year. Enjoy this look back at my time spent in this garden in June.

Woodies

Dichroa febrifuga is a somewhat obscure member of the hydrangea family that has pretty blue flowers in the summer.  This cultivar 'Yamaguchi Narrow Leaf' has thinner leaves.

Dichroa febrifuga is a somewhat obscure member of the hydrangea family that has pretty blue flowers in the summer. This cultivar 'Yamaguchi Narrow Leaf' has thinner leaves.

Cyrilla is a native shrub that tends to be underused.  It tolerates wet areas well.  Just note that it can be toxic to honey bees.  While many botanists say that Cyrilla racemiflora is the only member in the genus, other scientists have split it into additional species. For example, this smaller leaved-form native to northern Florida is named Cyrilla parviflora.

Cyrilla is a native shrub that tends to be underused. It tolerates wet areas well. Just note that it can be toxic to honey bees. While many botanists say that Cyrilla racemiflora is the only member in the genus, other scientists have split it into additional species. For example, this smaller leaved-form native to northern Florida is named Cyrilla parviflora.

In early summer new growth would emerge on Pinus wallichiana 'Zebrina'.  I loved the two-tone banding.

In early summer new growth would emerge on Pinus wallichiana 'Zebrina'. I loved the two-tone banding.

I’m a sucker for big leaf hydrangeas. Hydrangea macrophylla 'Frau Reiko' was one of my favorites for its white-margined bracts.

I’m a sucker for big leaf hydrangeas. Hydrangea macrophylla 'Frau Reiko' was one of my favorites for its white-margined bracts.

And, in June Dr. Dennis Werner’s award-winning, dwarf, and mostly sterile Buddleja ‘Blue Chip’ would flower.  It is a cute little shrub for small areas or garden border fronts.

And, in June Dr. Dennis Werner’s award-winning, dwarf, and mostly sterile Buddleja ‘Blue Chip’ would flower. It is a cute little shrub for small areas or garden border fronts.

Geophytes

The arboretum had a whole section devoted to geophytes, and in my opinion, June was one of the best times to see it.  It had finally gotten warm enough to push many of these herbaceous plants into flower.  Here we see a mass of the electric pink and yellow Gladiolus 'Flevo Kosmic'.

The arboretum had a whole section devoted to geophytes, and in my opinion, June was one of the best times to see it. It had finally gotten warm enough to push many of these herbaceous plants into flower. Here we see a mass of the electric pink and yellow Gladiolus 'Flevo Kosmic'.

Eucomis, or pineapply lily, would also start blooming in earnest in June.  Here ‘Sparkling Burgundy’ is just getting started.  These inflorescences last long as cut flowers.

Eucomis, or pineapply lily, would also start blooming in earnest in June. Here ‘Sparkling Burgundy’ is just getting started. These inflorescences last long as cut flowers.

Another pineapple lily that I loved was Eucomis montana for its ivory white bracts that would fade to green.  Did you know you can propagate Eucomis from leaf cuttings?

Another pineapple lily that I loved was Eucomis montana for its ivory white bracts that would fade to green. Did you know you can propagate Eucomis from leaf cuttings?

I admire a good color combo like this pairing of Dahlia 'Forncett Furnace' with the similarly colored Kniphofia uvaria 'Lola' in the back.

I admire a good color combo like this pairing of Dahlia 'Forncett Furnace' with the similarly colored Kniphofia uvaria 'Lola' in the back.

Here is a close up of Kniphofia uvaria 'Lola' since it’s not very visible above.  Note that not all Kniphofia are geophytes, but it fit in well here.

Here is a close up of Kniphofia uvaria 'Lola' since it’s not very visible above. Note that not all Kniphofia are geophytes, but it fit in well here.

A bee visits a flower of Dahlia 'Classic Elise' one evening. Even though they weren’t the large show flower forms, I appreciated seeing the dahlias at the arboretum just to know some could grow in the south.

A bee visits a flower of Dahlia 'Classic Elise' one evening. Even though they weren’t the large show flower forms, I appreciated seeing the dahlias at the arboretum just to know some could grow in the south.

 
I always enjoyed seeing the peach-colored flowers of Gladiolus dalenii ‘Boone’, a cultivar that was discovered in the North Carolina town of Boone. It also grows well here for me in Texas.

I always enjoyed seeing the peach-colored flowers of Gladiolus dalenii ‘Boone’, a cultivar that was discovered in the North Carolina town of Boone. It also grows well here for me in Texas.

 
The soft white of Sinningia tubiflora with just a hint of pink in the tube was a welcome sight in the geophyte border.

The soft white of Sinningia tubiflora with just a hint of pink in the tube was a welcome sight in the geophyte border.

And, I just had to throw this one in for kicks.  While not at the arboretum, I photographed this fasciated lily (far right stem) leaving Kilgore Hall where the horticulture program is housed to head to the gardens one morning.  Note how many flowers this specimen had compared to the others on the left.

And, I just had to throw this one in for kicks. While not at the arboretum, I photographed this fasciated lily (far right stem) leaving Kilgore Hall where the horticulture program is housed to head to the gardens one morning. Note how many flowers this specimen had compared to the others on the left.

Here’s a side view of the fasciation so you can see it better.  Fasciation is a fascinating phenomenon where a genetic disorder or disease causes the stem to elongate along an axis.  You often see it in flowers where the bloom will elongate in one direction, too.

Here’s a side view of the fasciation so you can see it better. Fasciation is a fascinating phenomenon where a genetic disorder or disease causes the stem to elongate along an axis. You often see it in flowers where the bloom will elongate in one direction, too.

HERBACEOUS Perennials

Many perennials achieved some serious height in June.  One of my favorite daylilies is Hemerocallis 'Autumn Minaret'.  I love it for its height, which allows one to plant it towards the back of a garden bed and still be enjoyed.

Many perennials achieved some serious height in June. One of my favorite daylilies is Hemerocallis 'Autumn Minaret'. I love it for its height, which allows one to plant it towards the back of a garden bed and still be enjoyed.

Eryngium also reach their pinnacle in summer.  Here the very structural Eryngium eburneum is loaded with flowers, and the inflorescences were over my head.

Eryngium also reach their pinnacle in summer. Here the very structural Eryngium eburneum is loaded with flowers, and the inflorescences were over my head.

Many people plant cardoons for their lovely winter foliage, but Cynara cardunculus also has flowers where the rays resemble glowing purple fiber-optic wires.  Bees and other pollinators love these large Asteraceae blooms.

Many people plant cardoons for their lovely winter foliage, but Cynara cardunculus also has flowers where the rays resemble glowing purple fiber-optic wires. Bees and other pollinators love these large Asteraceae blooms.

Vernonia lindheimeri is an ironweed I’ve been wanting to get my hands on for its velvety stems.

Vernonia lindheimeri is an ironweed I’ve been wanting to get my hands on for its velvety stems.

A really cool and somewhat rare plant at the arboretum was the endangered Baptisia arachnifera.  This plant is native to two counties in Georgia and thrives in drier, sandier soils.  It was quite at home here in the scree garden.

A really cool and somewhat rare plant at the arboretum was the endangered Baptisia arachnifera. This plant is native to two counties in Georgia and thrives in drier, sandier soils. It was quite at home here in the scree garden.

Panicum virgatum 'Cheyenne Sky' is an improved form of ‘Shenandoah’.  To me it seemed to have more maroon color in the foliage earlier in the summer.

Panicum virgatum 'Cheyenne Sky' is an improved form of ‘Shenandoah’. To me it seemed to have more maroon color in the foliage earlier in the summer.

Ratibida pinnata is another underused native perennial. Sure, it can get a little tall, but I just love the rich yellow rays on this species.

Ratibida pinnata is another underused native perennial. Sure, it can get a little tall, but I just love the rich yellow rays on this species.

 
One of my favorite color combination in the long border was this pairing of Echinacea purpurea 'Stewart's Pink', Panicum virgatum 'Shenandoah', and Monarda 'Violet Queen'.

One of my favorite color combination in the long border was this pairing of Echinacea purpurea 'Stewart's Pink', Panicum virgatum 'Shenandoah', and Monarda 'Violet Queen'.

 
I leave you with these two cool gradient shots that show the annuals in the trial garden.  Here we have a warm gradient of Portulaca,…

I leave you with these two cool gradient shots that show the annuals in the trial garden. Here we have a warm gradient of Portulaca,

… and here we fade from warm to cool for these Verbena.

… and here we fade from warm to cool for these Verbena.

Philadelphia Flower Show 2021

Karen and I did a whirlwind trip through Philadelphia earlier this month to see the Philadelphia Flower Show the first day it opened to the public. I’m going to let the pictures and the captions below do most of the talking about our experience, but suffice it to say the show was an incredible experience. It was the first time I had ever been to the Philly Flower Show, and it was also the first time in the show’s 192 year existence that it was held outdoors. This floral spectacle is typically held in March, and that timing never fit well with my teaching schedule. While I don’t have previous times with which to compare this experience, I was amazed at the creativity and use of plant material in the exhibits. Many also commented on how rich the plants and designs glowed outdoors compared to the typical enclosed environment. Enjoy the photos!

Entering the Flower Show

The theme this year was habitat, not just for plants and nature, but also habitat for humans.   At the entrance of the flower show we were greeted by life-size letters spelling out habitat.  The fronts were adorned with flowers and the backs were filled with colorful twigs. 

The theme this year was habitat, not just for plants and nature, but also habitat for humans. At the entrance of the flower show we were greeted by life-size letters spelling out habitat.  The fronts were adorned with flowers and the backs were filled with colorful twigs. 

 
My good friend and Vice President of Public Horticulture at PHS Andrew Bunting joined us for a bit near the entrance to share more about the show.  He said this Lysimachia atropurpurea 'Beaujolais', which appeared at Chelsea a few years ago, is used throughout this planting with Strobilanthes, Gomphrena, and Scabiosa further tying together the purple theme.

My good friend and Vice President of Public Horticulture at PHS Andrew Bunting joined us for a bit near the entrance to share more about the show. He said this Lysimachia atropurpurea 'Beaujolais', which appeared at Chelsea a few years ago, is used throughout this planting with Strobilanthes, Gomphrena, and Scabiosa further tying together the purple theme.

 
Behind the habitat letters was an incredible floral structure designed by Jeff Leatham, a celebrity florist who has done designs for the Kardashians.

Behind the habitat letters was an incredible floral structure designed by Jeff Leatham, a celebrity florist who has done designs for the Kardashians.

Andrew told us that Jeff Leatham’s installation featured dried fern fronds and baby’s breath spray painted in electric pink and orange. 

Andrew told us that Jeff Leatham’s installation featured dried fern fronds and baby’s breath spray painted in electric pink and orange. 

Here you can see the color echo between the two exhibits.

Here you can see the color echo between the two exhibits.

The entrance of the flower show was rife with colorful banners.

The entrance of the flower show was rife with colorful banners.

 
The main sign you saw in the image above welcoming all to the flower shows was supported by these stacked planter boxes filled with colorful plants.

The main sign you saw in the image above welcoming all to the flower shows was supported by these stacked planter boxes filled with colorful plants.

 
Andrew said that Bloombox was like the Amazon of plants in Philadelphia.  They had an exhibit here showing their truck packed with plants for delivery.

Andrew said that Bloombox was like the Amazon of plants in Philadelphia. They had an exhibit here showing their truck packed with plants for delivery.

Wambui Ippolito, Etherea

Best of show went to Wambui Ippolito for Etherea, a reimagining of the grassland habitat in her native east Africa.

Best of show went to Wambui Ippolito for Etherea, a reimagining of the grassland habitat in her native east Africa.

 
We got the meet Wambui Ippolito, and she was so sweet and kind in talking with us.

We got the meet Wambui Ippolito, and she was so sweet and kind in talking with us.

 
Rusted metal, wood, and gravel were dominant hardscape elements among the rich flora.

Rusted metal, wood, and gravel were dominant hardscape elements among the rich flora.

Another shot of Wambui Ippolito’s Etherea showing a kettle of water and a wavy wooden bench.

Another shot of Wambui Ippolito’s Etherea showing a kettle of water and a wavy wooden bench.

Patrick Cullina, The Reinvention of Nature

I was delighted to know that my friend Patrick Cullina would be at the flower show with his The Reinvention of Nature.  Pat is a wizard at imbuing ruins like the High Line and Bethlehem Steel with flora, and he did it again with this garden that featured reclaimed windows, rusted panels, and a water feature.  The space was planted with towering Magnolia macrophylla and Taxodium ascendens (or the new mouthful name Taxodium distichum var. imbricarium).  The floral exhibit in the distance added a nice color contrast.

I was delighted to know that my friend Patrick Cullina would be at the flower show with his The Reinvention of Nature. Pat is a wizard at imbuing ruins like the High Line and Bethlehem Steel with flora, and he did it again with this garden that featured reclaimed windows, rusted panels, and a water feature. The space was planted with towering Magnolia macrophylla and Taxodium ascendens (or the new mouthful name Taxodium distichum var. imbricarium). The floral exhibit in the distance added a nice color contrast.

Pat’s exhibit also featured a short back form of Dan Benarcik’s chairs.

Pat’s exhibit also featured a short back form of Dan Benarcik’s chairs.

Bees went wild over the magnolia flowers.  And, I even loved how in this photo the Salvia flowers echo the magnolia’s color spots.

Bees went wild over the magnolia flowers. And, I even loved how in this photo the Salvia flowers echo the magnolia’s color spots.

Donald Pell Gardens, The Wild Garden

I loved this dining area that rested on a stone plinth within a glade of native trees for Donald Pell Garden’s The Wild Garden.

I loved this dining area that rested on a stone plinth within a glade of native trees for Donald Pell Garden’s The Wild Garden.

This exhibit also featured cool wood burned signs that described the plants like you see here with this herbaceous matrix.

This exhibit also featured cool wood burned signs that described the plants like you see here with this herbaceous matrix.

Arrange, Floral, & Event Design, Habitats of the North American Cryptids

Some of the exhibits we would learn were more floral themed.  I thought this installation that focused on the imagined habitats of the North America cryptids like chupacabra, the Jersey Devil, Sasquatch, and moth man was really clever.

Some of the exhibits we would learn were more floral themed. I thought this installation that focused on the imagined habitats of the North America cryptids like chupacabra, the Jersey Devil, Sasquatch, and moth man was really clever.

 
Moth man’s cocoon was made out of various knick-knacks and planted with the color echoing Ricinus and Coleus.

Moth man’s cocoon was made out of various knick-knacks and planted with the color echoing Ricinus and Coleus.

 

American Institute of Floral Designers, Habitat Reclaimed

Habitat Reclaimed by the American Institute of Floral Designers featured a house frame taken over by various floral accoutrements.

Habitat Reclaimed by the American Institute of Floral Designers featured a house frame taken over by various floral accoutrements.

Karen loved these foliage pillows sitting on a bench.

Karen loved these foliage pillows sitting on a bench.

Another side of the house shows more of the floral arrangements that have reclaimed this space.

Another side of the house shows more of the floral arrangements that have reclaimed this space.

And, inside the house was a floral take on van Gogh’s Starry Night.

And, inside the house was a floral take on van Gogh’s Starry Night.

Treeline Designz, Dancing with Nature

Treeline Designz Dancing with Nature featured the use of bamboo, not only in the structure but also as a featured plant material.

Treeline Designz Dancing with Nature featured the use of bamboo, not only in the structure but also as a featured plant material.

Andrew commented that it was fun watching them assemble this exhibit with trying to get these ball and burlap bamboos through the grid above.

Andrew commented that it was fun watching them assemble this exhibit with trying to get these ball and burlap bamboos through the grid above.

The inside of a few of the cut bamboo were painted to help draw you into the display.

The inside of a few of the cut bamboo were painted to help draw you into the display.

Nomad Studio, Kokedama Forest

One of my favorite installations was Kokedama Forest by Nomad Studio that was designed to highlight soil microflora and how this habitat is a network that supports plants and animals.   Standing outside you can easily see the frame…

One of my favorite installations was Kokedama Forest by Nomad Studio that was designed to highlight soil microflora and how this habitat is a network that supports plants and animals. Standing outside you can easily see the frame…

…but inside, it is harder to see this underground habitat with all the plants.  I also loved how they created this amphitheater effect where walking through we see and enjoy the plants because of this underlying soil network.  This photo was a bit of a challenge to take because there was a line of about 20 people to see the exhibit.

…but inside, it is harder to see this underground habitat with all the plants. I also loved how they created this amphitheater effect where walking through we see and enjoy the plants because of this underlying soil network. This photo was a bit of a challenge to take because there was a line of about 20 people to see the exhibit.

Another shot of the native trees growing as kokedama, moss-covered balls of soil that support a plant.

Another shot of the native trees growing as kokedama, moss-covered balls of soil that support a plant.

 
Here is a close up of the kokedama so you can better see the supporting balls.

Here is a close up of the kokedama so you can better see the supporting balls.

 

Jennifer Designs, Nature’s Resilience

 
This exhibit by Jennifer Designs showcased the resilence of nature, and the plight of the Australian outback with the wildfires they recently faced.

This exhibit by Jennifer Designs showcased the resilence of nature, and the plight of the Australian outback with the wildfires they recently faced.

 

Petit Jardin en Ville, Beauté et Générosité

I loved the quaintness of these European-themed courtyards for Petit Jardin en Ville’s Beauté et Générosité.  The first featured shrubs and trees in a formal planting.

I loved the quaintness of these European-themed courtyards for Petit Jardin en Ville’s Beauté et Générosité. The first featured shrubs and trees in a formal planting.

The second courtyard had a water feature and more herbaceous plants.

The second courtyard had a water feature and more herbaceous plants.

And, the third was an edible garden complete with dining area, planter boxes, and cold frame wires.

And, the third was an edible garden complete with dining area, planter boxes, and cold frame wires.

WRT, Painted Threats

WRT did this cool exhibit where they painted invasive species like non-native phragmites a bright pink to show them entering native habitats.  I also loved how educational their install was with the signage.

WRT did this cool exhibit where they painted invasive species like non-native phragmites a bright pink to show them entering native habitats. I also loved how educational their install was with the signage.

Don’t you just love this modern take on a bird house?

Don’t you just love this modern take on a bird house?

Native habitat prior to invasive species entering features a rich wetland flora.  It is amazing to me that people can build a wetland in two-weeks!

Native habitat prior to invasive species entering features a rich wetland flora. It is amazing to me that people can build a wetland in two-weeks!

WISH Unlimited, Faraway, So Close

 
WISH Unlimited showed how we have been living in the pandemic. A giant terrarium features Araucaria, succulents and tropicals, and of course a microphone to illustrate how technology kept us connected in our isolation.

WISH Unlimited showed how we have been living in the pandemic. A giant terrarium features Araucaria, succulents and tropicals, and of course a microphone to illustrate how technology kept us connected in our isolation.

 

PHS Gardeners Green

The Gardeners Green was a place that attendees could come learn more about horticultural practices and the Pennsylvania Horticultural Society.  It was based on public commons that once dotted the city.  Aren’t those espaliered fruit trees awesome?

The Gardeners Green was a place that attendees could come learn more about horticultural practices and the Pennsylvania Horticultural Society. It was based on public commons that once dotted the city. Aren’t those espaliered fruit trees awesome?

At the Gardeners Green, they did a demo of willow weaving, a natural approach to building garden edging and fencing.

At the Gardeners Green, they did a demo of willow weaving, a natural approach to building garden edging and fencing.

They even had beehives in the Gardeners Green!

They even had beehives in the Gardeners Green!

STUDENT EXHIBITS

I was delighted to see some student entries.  In one section were several designs that offered a new way of thinking about hell strips by calling them heaven strips.  The Evergreens of New Jersey planted this minute paradise.

I was delighted to see some student entries. In one section were several designs that offered a new way of thinking about hell strips by calling them heaven strips. The Evergreens of New Jersey planted this minute paradise.

And, here was Covid Confinements, an installation by the Horticulture Academy of Abraham Lincoln High School that showed how teenagers lived during the pandemic.

And, here was Covid Confinements, an installation by the Horticulture Academy of Abraham Lincoln High School that showed how teenagers lived during the pandemic.

Hudson Valley Seed Company

I have to give a shoutout to Hudson Valley Seed Company and their brilliant seed packets.  Many packets feature an artist’s handiwork.

I have to give a shoutout to Hudson Valley Seed Company and their brilliant seed packets. Many packets feature an artist’s handiwork.

 
Hudson Valley Seed Company also had some educational displays in their tent showing more about the artist and the plant.

Hudson Valley Seed Company also had some educational displays in their tent showing more about the artist and the plant.

 

I wish we had more time at the show, but an afternoon flight beckoned us home. But, from this morning visit, I know I can’t wait to get back to Philadelphia again, hopefully at yet another time the flower show is being held!

Scarlet Penstemon

Red is one of my favorite colors. I’ve joked since a kid that I love it so much that it is part of my name, Jared. I even love variations of the hue—scarlet, coral, vermillion, crimson, cherry, garnet, and the list goes on.

Red is a bit of an unusual color to have on native flowers. Think about it. You can probably count on your fingers and maybe toes native southeastern wildflowers that feature this intense warm color. Most flowers that are not wind pollinated seem to have purple, yellow, pink, or white adorning their petals. But, red flowers are a bit rarer and likely evolved for the hummingbird pollination syndrome since birds can perceive this hue better.

I was delighted after I moved to Texas to add another red flower to my plant palette, scarlet penstemon. I first saw Penstemon murrayanus in a garden bed in Nacogdoches. I was so intrigued with its perfoliate leaves on the inflorescence that wrap all the way around the stem. The flowers looked like they were rising out of little teal green platters.

 
Perfoliate leaves on Penstemon murrayanus are an intriguing morphological feature.  It is so neat how they wrap around the stem.

Perfoliate leaves on Penstemon murrayanus are an intriguing morphological feature. It is so neat how they wrap around the stem.

 

After buying our house, I wanted to add scarlet penstemon to my plantings. On the road to town one day I discovered some plants growing right under a power line back off the road. I was surprised to see this species thriving in sandy grit amongst Yucca. But, this site helped me understand the conditions where it grows.

A small population of Penstemon murrayanus growing along the roadside in Nacogdoches county.

A small population of Penstemon murrayanus growing along the roadside in Nacogdoches county.

These plants I found provided a source of genetics for me to get my plants started. I collected seed after the seed capsules dried, but I learned that getting the seed to germinate is a challenge. The first year, I sowed seed at the start of winter to allow them to naturally stratify, but I only had two seedlings emerge out of the batch. Fortunately, they flower the second year after their attractive glaucous green foliage bulks up for the first growing season. While I love the height the plants get, they are also see through, so they can be planted at the front or the back of the bed and not impede the view. Their opacity allows me to sit on my porch and easily watch Ruby-throated Hummingbirds dot from plant to plant.

I like how I can see through the inflorescences of Penstemon murrayanus.

I like how I can see through the inflorescences of Penstemon murrayanus.

The purple in the stem here created a great color echo with the Prunella vulgaris behind.

The purple in the stem here created a great color echo with the Prunella vulgaris behind.

I should add that I have had my challenges growing it. The foliage and even sometimes an inflorescence will die back to the ground due to a fungal disease. My guess is that my soil is more dense than the sandy soil where I found this species and holds more water. This issue seems to be a common one with Penstemon in the wetter parts of the country.


Going back to the challenge of getting new plants started, I was able to collect enough seed off my plants this year that my graduate student Zy Tippins was able to see if germination could be enhanced on Penstemon murrayanus. Her master’s thesis has been focusing on the use of gibberellic acid and liquid smoke to improve seed germination of native perennial seed. Gibberellic acid is a plant hormone that promotes germination. Liquid smoke can contain karrakins, another germination promoting hormone. There’s research that demonstrates after a fire passes through an ecosystem that karrakins are produced and help increase germination of some plant species. While gibberellic acid can be a bit of a challenge for home owners to acquire, smoke water is readily available from grocery stores. Zy was seeing if smoke water could be used with or without gibberellic acid to increase germination.

As you can see from her research below, seed that only received water and no stratification had 9% germination; stratifying seed for three months increased germination to 20%. But, seeds that had smoke water and three months of stratification had 46% germination! That means with using smoke water and then moist chilling the seeds in the fridge you can almost quadruple seed germination over the control. This data was some of the most exciting from her work. She’s finishing up her thesis this summer, so I’ll definitely post the link later if you want to learn more about her research.

Penstemon murrayanus seeds that were treated with a dilute smoke water solution and then stratified for three months had better germination (46%) compared to the non-stratified (9%) and stratified (20%) control.  Thanks to my graduate student Zy Tippins for sharing this slide with me.

Penstemon murrayanus seeds that were treated with a dilute smoke water solution and then stratified for three months had better germination (46%) compared to the non-stratified (9%) and stratified (20%) control. Thanks to my graduate student Zy Tippins for sharing this slide with me.

My hope is that with her research Penstemon murrayanus will become more available in the trade now that we better understand its germination requirements. Yes, it is an obscure perennial, but it certainly deserves wider use in our gardens.

April at the JC Raulston Arboretum

This post is 4 of 12 of a series I’m doing this year reflecting back on some of my favorite plants from visiting the JC Raulston Arboretum while attending graduate school at NC State in Raleigh NC. Check back next month for more.

This week was our last week of classes on campus. The end of the semester is always hectic, but it was even more so this year with the stress of the pandemic and the impact on students.

I recall back in graduate school that towards the end of the semester when things got crazy, I found myself wanting to go to the JC Raulston Arboretum to experience the plants and nature. I would go on long walks there enjoying the flowers and plant life often as a break between projects, papers, and research. And, April is certainly a good time to explore a garden as it erupts with color. It always amazed me that even though March felt full of color, April could always beat it.

April was also the first time I ever visited the JC Raulston Arboretum when I was interviewing for my graduate school position, so this month certainly holds a special place in my heart when visiting. Enjoy these photos of some of my favorite plants from the arboretum in April. I hope they inspire you to try a few new ones in your garden.

While many cherry trees struggle in the southeast, I delighted at the size of this Prunus serrulata ‘Ukon’ and its semi-double, creamy green colored flower petals.  The cultivar name means turmeric.

While many cherry trees struggle in the southeast, I delighted at the size of this Prunus serrulata ‘Ukon’ and its semi-double, creamy green colored flower petals. The cultivar name means turmeric.

 
The parade of Magnolia continued into early April at the arboretum.  Magnolia × loebneri 'Leonard Messel' is beloved by many for its color and frost tolerant flowers.

The parade of Magnolia continued into early April at the arboretum. Magnolia × loebneri 'Leonard Messel' is beloved by many for its color and frost tolerant flowers.

 
Magnolia ‘Coral Lake’ is hands down one of my top five favorite Magnolia cultivars.  I just love the two-tone yellow and pink color.

Magnolia ‘Coral Lake’ is hands down one of my top five favorite Magnolia cultivars. I just love the two-tone yellow and pink color.

 
Another shot of Magnolia ‘Coral Lake’.  It was fun watching it become a small-statured tree during my time in Raleigh.

Another shot of Magnolia ‘Coral Lake’. It was fun watching it become a small-statured tree during my time in Raleigh.

 
I can’t wait to acquire some Magnolia ‘Lois’ for planting around our log cabin.  Many consider this selection one of the best yellows because it is more compact and later flowering; thus, it tends to miss the freezes.

I can’t wait to acquire some Magnolia ‘Lois’ for planting around our log cabin. Many consider this selection one of the best yellows because it is more compact and later flowering; thus, it tends to miss the freezes.

One of my last years in graduate school I discovered this Cornus florida ‘Plena’ in a hidden corner of the arboretum.  This cultivar features multiple bracts.  I was amazed that after being there five years and walking all over there were still plants I hadn’t noticed yet.

One of my last years in graduate school I discovered this Cornus florida ‘Plena’ in a hidden corner of the arboretum. This cultivar features multiple bracts. I was amazed that after being there five years and walking all over there were still plants I hadn’t noticed yet.

Another favorite dogwood was the dwarf Cornus florida ‘Suwannee Squat’.  Normally I’m looking up at dogwood flowers, but with this selection, I looked down on them.

Another favorite dogwood was the dwarf Cornus florida ‘Suwannee Squat’. Normally I’m looking up at dogwood flowers, but with this selection, I looked down on them.

Sinojackia xylocarpa 'La Grima' is a lovely upright selection of jack tree.  Doesn’t it have such a nice vase shape?

Sinojackia xylocarpa 'La Grima' is a lovely upright selection of jack tree. Doesn’t it have such a nice vase shape?

 
I loved standing under Sinojackia xylocarpa 'La Grima' when it was in full flower and admiring the star-shaped flowers.

I loved standing under Sinojackia xylocarpa 'La Grima' when it was in full flower and admiring the star-shaped flowers.

 
Here’s one this Tennessee native loves, Cercis canadensis ‘Tennessee Pink’!  The flowers have such a rich pink color, and this redbud has good vigor.

Here’s one this Tennessee native loves, Cercis canadensis ‘Tennessee Pink’! The flowers have such a rich pink color, and this redbud has good vigor.

One can’t talk about the plants at the JC Raulston Arboretum and not mention the incredible development of Calycanthus × raulstonii 'Hartlage Wine'.  A cross between Calycanthus floridus and Calycanthus chinensis, this cross by Richard Hartlage has incredible vigor.  The flowers are larger than either parent, and I’ve heard of some plants growing over 20 feet tall.

One can’t talk about the plants at the JC Raulston Arboretum and not mention the incredible development of Calycanthus × raulstonii 'Hartlage Wine'. A cross between Calycanthus floridus and Calycanthus chinensis, this cross by Richard Hartlage has incredible vigor. The flowers are larger than either parent, and I’ve heard of some plants growing over 20 feet tall.

 
In the old rose garden, I always admired the southern classic Rosa banksiae 'Lutea' or Lady Banks rose.  Amazingly, ours on campus this year was badly burned by the sub-zero temperatures we experienced.

In the old rose garden, I always admired the southern classic Rosa banksiae 'Lutea' or Lady Banks rose. Amazingly, ours on campus this year was badly burned by the sub-zero temperatures we experienced.

 
Isn’t this color on Rhododendron × bakeri ‘Cylo Red’ incredible?  I don’t think I’ve ever seen such an intense pink on a native azalea before.

Isn’t this color on Rhododendron × bakeri ‘Cylo Red’ incredible? I don’t think I’ve ever seen such an intense pink on a native azalea before.

Oakleaf hydrangeas are one of my favorite, if not my most favorite, shrubs.  The JC Raulston Arboretum was one of the first places I saw the gold leaf Hydrangea quercifolia ‘Little Honey’.  I would end up having one of these in my apartment patio container collection for a few years after seeing it in the arboretum.

Oakleaf hydrangeas are one of my favorite, if not my most favorite, shrubs. The JC Raulston Arboretum was one of the first places I saw the gold leaf Hydrangea quercifolia ‘Little Honey’. I would end up having one of these in my apartment patio container collection for a few years after seeing it in the arboretum.

It might not look like much, but Croton alabamensis is a durable and tough shrub for the southeast.  It is rare, though, and only occurs in a few counties in Alabama and Texas.

It might not look like much, but Croton alabamensis is a durable and tough shrub for the southeast. It is rare, though, and only occurs in a few counties in Alabama and Texas.

 
A close up of the inconspicuous flowers of Croton alabamensis

A close up of the inconspicuous flowers of Croton alabamensis

 
Ungnadia speciosa is a wonderful and underused native large shrub/large tree.  It is called Mexican buckeye because these purple, red-bud like flowers produce capsules that produce marble-sized seed in the fall.

Ungnadia speciosa is a wonderful and underused native large shrub/large tree. It is called Mexican buckeye because these purple, red-bud like flowers produce capsules that produce marble-sized seed in the fall.

 
A close up of the flowers of Ungnadia speciosa

A close up of the flowers of Ungnadia speciosa

 
Many Acer palmatum have incredible spring foliage color.  Don’t you just love the red-tinged margins on the gold foliage of Acer palmatum 'Orange Dream'?

Many Acer palmatum have incredible spring foliage color. Don’t you just love the red-tinged margins on the gold foliage of Acer palmatum 'Orange Dream'?

I enjoy Deutzia, even though they can look a little scraggly later in the year.  Most Deutzia I had seen had white flowers, but I loved the pink highlights on Deutzia scabra 'Pink Minor'.

I enjoy Deutzia, even though they can look a little scraggly later in the year. Most Deutzia I had seen had white flowers, but I loved the pink highlights on Deutzia scabra 'Pink Minor'.

Exochorda ‘Blizzard’ is an improved selection bred by Tom Ranney.  The flowers on this pearlbush are double the size of other Exochorda cultivars.

Exochorda ‘Blizzard’ is an improved selection bred by Tom Ranney. The flowers on this pearlbush are double the size of other Exochorda cultivars.

Growing up, we had black locust on fence rows, and their white flowers in April were always a sign that spring had arrived.  I loved discovering this pink form of Robinia × margaretta 'Pink Cascade'.

Growing up, we had black locust on fence rows, and their white flowers in April were always a sign that spring had arrived. I loved discovering this pink form of Robinia × margaretta 'Pink Cascade'.

If you didn’t get enough Baptisia last week, here’s a shot of Baptisia alba var. alba.  Again, don’t you just love the smoky purple stems?

If you didn’t get enough Baptisia last week, here’s a shot of Baptisia alba var. alba. Again, don’t you just love the smoky purple stems?

My mom had this exact planting combination back at our house in Tennessee, a carpet of Athyrium niponicum var. pictum under Polygonatum odoratum 'Variegatum'.  It is such a great color combination that will really last all growing season for much of the country.

My mom had this exact planting combination back at our house in Tennessee, a carpet of Athyrium niponicum var. pictum under Polygonatum odoratum 'Variegatum'. It is such a great color combination that will really last all growing season for much of the country.

Pulsatilla were a new species I learned from my visits to the arboretum, and I grew to love their feathery seed heads.  This is Pulsatilla cernua, a species native to Asia.  I learned something fascinating researching this post.  Scientists have noted that the flowers go from upright to pendulous to upright again over the week and a half that the flowers are in bloom.  They noted the plants likely exhibited this behavior to protect the pollen from rain.

Pulsatilla were a new species I learned from my visits to the arboretum, and I grew to love their feathery seed heads. This is Pulsatilla cernua, a species native to Asia. I learned something fascinating researching this post. Scientists have noted that the flowers go from upright to pendulous to upright again over the week and a half that the flowers are in bloom. They noted the plants likely exhibited this behavior to protect the pollen from rain.

Don’t you love how the corona color on these Narcissus 'Golden Echo' fades into the petals? They echo the gold found in the cup.  Oh, breeder, I see what you did with the name there…

Don’t you love how the corona color on these Narcissus 'Golden Echo' fades into the petals? They echo the gold found in the cup. Oh, breeder, I see what you did with the name there…

Seeing the beautiful Camassia leichtlinii 'Alba' reminds me that I need to try Camassia in Texas. I do love this white selection of camas or quamash.

Seeing the beautiful Camassia leichtlinii 'Alba' reminds me that I need to try Camassia in Texas. I do love this white selection of camas or quamash.

I’m a sucker for the clusiana tulips.  They look like cute lollypops you could just eat up.  Here’s the peachy-colored Tulipa clusiana var. chrysantha.

I’m a sucker for the clusiana tulips. They look like cute lollypops you could just eat up. Here’s the peachy-colored Tulipa clusiana var. chrysantha.

And, here’s the lovely Tulipa clusiana 'Cynthia'.

And, here’s the lovely Tulipa clusiana 'Cynthia'.

And, the faded peppermint colors of Tulipa clusiana 'Lady Jane'.  I’ve GOT to order some clusiana tulips for planting this fall!

And, the faded peppermint colors of Tulipa clusiana 'Lady Jane'. I’ve GOT to order some clusiana tulips for planting this fall!

I’m always enchanted by the yellow bells of the native Uvularia grandiflora.

I’m always enchanted by the yellow bells of the native Uvularia grandiflora.

I saved one of my favorites for last.  Watching Scilla peruviana flowers unfurl was always a true spectacle to enjoy in the garden.  It was like watching a firework explode over days.

I saved one of my favorites for last. Watching Scilla peruviana flowers unfurl was always a true spectacle to enjoy in the garden. It was like watching a firework explode over days.

And, of course, April at the JC Raulston Arboretum brings to mind their galas from years past.  Will Hooker and his permaculture class built this incredible dragon one year out of bamboo to tie into the Asian theme.

And, of course, April at the JC Raulston Arboretum brings to mind their galas from years past. Will Hooker and his permaculture class built this incredible dragon one year out of bamboo to tie into the Asian theme.