Leave the Butchery Behind: How to Properly Prune Crape Myrtle Trees

Crape myrtle trees (Lagerstroemia) are to the southern United States what ivy is to university towers. Imperative. Expected. Greatly appreciated, and… lovely.

How To Prune Crape Myrtle Trees

Though not as ubiquitous as they are the Southeast, the crape myrtle’s range also extends to the Southwest and up the west coast, where they are also revered for their great beauty.

Heralding summer’s arrival, crape myrtles erupt in May, June, or July with profuse clusters of delicate flowers in a myriad of colors, including white, various shades of pink, purple, yellow, and even red.

As spectacular as they are in summer, in fall they lose their leaves and gardeners are left with bare branches, stems, and twigs begging to be whipped into shape.

But how to trim? If you know anything about crape myrtles, you know this is a subject of great debate among home gardeners and experts alike. Let’s look at historical and modern best practices for pruning crape myrtle trees.

But First…

You might be shaking your head as you read this, admonishing us for our spelling. It is true that there are several accepted spellings for this alluring tree, including “crepe myrtle,” “crapemyrtle,” and the one we have chosen, “crape myrtle.”

Authoritative sources far and wide differ on the correct way to spell the name of this plant species, all with good justification. Nevertheless, we chose “crape myrtle” because Merriam-Webster indicates it is their preferred spelling, and if you can’t trust the dictionary, what can you trust?

The Dark Ages

Once upon a time, these enchanting trees were “topped” — each trunk, limb and twig chopped to a uniform height across the width of the plant to create a plane so level you could balance a dinner plate on the butchered stalks.

Poorly Pruned Crape Myrtle Trees | GardenersPath.com
These trees aren’t as butchered as some examples we’ve seen, but they’re far from well-trimmed.

This type of “crape murder” results in stubby limbs from which long, gawky canes of new growth emerge. These skinny shoots are too weak to hold up their flowers, and they flop over like an overtired toddler in her highchair, or break off completely.

Another result of overzealous annual pruning are the unattractive “knuckles” that form at the site of the cuts. These ugly, bulbous knots and bumps form over the years in response to repeated whackings.

Add the knuckles to the gawky canes that flop, and your graceful tree becomes considerably less so. Furthermore, not allowing the trunks to mature means you’ll never get the attractive, mottled bark common to older trees.

‘Baton Rouge’ Crape Myrtle, available on Amazon

Sometimes this treachery was committed because “crape myrtles bloom on new growth,” as the wisdom went. And while they do bloom on new growth, they also bloom perfectly fine on old growth, thank you very much!

Other times, a crape myrtle may be severely pruned to control the tree’s height. Nooooooo!

If you need a smaller variety, dig up the one you have, move it, and replace it with one more appropriately sized, recommends North Carolina State University Cooperative Extension.

Crapes are available in a wide range of sizes, from the shrub-like ‘Baton Rouge’ at two to three feet tall, to the towering Natchez,’ which can grow to 30 feet.

Additionally, severely pruning these colorful beauties can delay their bloom period by four to eight weeks.

And, finally, remember that just because your neighbor does it doesn’t mean you have to.

So What’s the Right Way?

Crape Myrtle Seed Pods in Winter | GardenersPath.com
You can leave the seed pods alone. Or cut them and bring them indoors for an attractive container filler.

Whereas many plants do well with spring pruning, the best time to trim your crape myrtle is in late winter, before it leafs out. You can see the branches and twigs better before it’s all filled in.

According to Clemson Cooperative Extension, if your tree is out of control with many trunks,  for most crape myrtles you’ll want to choose three or five main trunks to preserve.

As with many aspects of gardening, an odd number is more aesthetically pleasing than an even number. Keep straight, strong trucks that have plenty of room to grow.

You’ll need these tools, and make sure they’re sharp and rust-free:

  • Hand pruners for twigs and branches less than 1/2-inch thick
  • Loppers for branches 1/2 to 1 1/2-inches thick
  • Pruning saw or pole pruner for branches thicker than 1 1/2 inches

When you’re ready to go, here’s the order in which you’ll judiciously shape your tree:

1. Prune suckers and any trunks that need to go as close as possible to the main trunk or soil. This will avoid leaving insect-vulnerable and unsightly stubs.

2. Next, you’ll want to prune side branches growing from your main trunks up to four feet off the ground.

3. Then, look for higher branches that are growing inward toward the center of the tree, and get rid of those.

4. Trim any branches that are crossing or rubbing against each other.

5. Cut out any dead branches.

6. Get rid of branches growing at odd angles and detracting from the tree’s appearance.

7. You may choose to remove the seedheads at the end of the branches, or you may leave them. Leaving them does not reduce blooming.

Now, you’ll have a beautifully shaped tree ready to burst into color.

Fixing Someone Else’s Mess

Let’s say you move into a new house and the previous owner so egregiously mauled a crape myrtle that you’re at an utter loss as to how to fix it.

Pink Crape Myrtle Trees | GardenersPath.com

Here’s how:

Cut all the trunks completely to the ground, then carefully manage the shoots that come back. Save the vigorous and properly placed shoots, and cut the rest.

The robust root system tied to the old tree will enable rapid growth, and you’ll have an attractive tree within a year or two.

Do You Even Need to Prune Them?

Pruning Crape Myrtle Trees | GardenersPath.com

You certainly can get away without doing a speck of pruning on your crapes. They will leaf out and bloom beautifully and, to the untrained eye speeding by on the way to soccer practice, appear quite attractive.

Over the millennia, more than one crape myrtle has gone un-pruned and has lived to tell the tale.

But in your heart of hearts, you will know that the tree could look much cleaner, much shapelier, and simply better, with just a few quick cuts on a sunny February day.

Homework Assignment

If your trees are leafed out and in full bloom, pour a glass of iced tea, sit on the porch, and admire them. Think about how their shape might be improved.

And then, come late winter, pull out your tools. With visions of delicate flowers dancing in your head, get to work creating even more spectacular trees.

Are you guilty of butchery? Are you reformed? Tell us below!


Don’t forget to Pin It!

The crape myrtle is celebrated for its abundant groupings of colorful and delicate flowers in hues from white to deep red. If you know anything about these trees, you know that pruning them is a subject of great debate. To learn the proper way to trim crape myrtle trees, read more now on Gardener’s Path.

 

Photo credits: Shutterstock.

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About Gretchen Heber

A former garden editor for a daily newspaper in Austin, Texas, Gretchen Heber goes through entirely too many pruners and garden gloves in a year’s time. She’s never met a succulent she didn’t like and gets really irritated every 3-4 years when Austin actually has a freeze cold enough to kill them. To Gretchen, nothing is more rewarding than a quick dash to the garden to pluck herbs to season the evening meal. And it’s definitely time for a happy dance when she’s able to beat the squirrels to the peaches, figs, or loquats.

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Heather
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Heather

I live in a neighborhood with lots of crape myrtles, and I’ve seen many of them topped. It’s sad to see them grow in wrong and eventually end up dying. Thanks for sharing these pruning tips!

TREE TRIMMING
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TREE TRIMMING

This was a great, excellent, informative post you have shared on this page about the pruning of crape myrtle. If your trees are leafed out and in full bloom, pour a glass of iced tea, sit on the porch, and admire them. Think about how their shape might be improved.
Thanks.

Constance Edmundson
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Constance Edmundson

I cut my Myrtles below the massive knots but not to the ground. It’s been two weeks and there is no new growth. What should I do?

Marie Lawton
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Marie Lawton

HELP! My crepe myrtles have green healthy leaves but I must transplant 3 now! My driveway has to be widened and I don’t want to lose these trees who took 10 years to grow to 8 feet from small twig-like plants. Can they still be transplanted in May?

Kelly Crook
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Kelly Crook

Hello! I have a crape myrtle that is about 3 years old and this year it only had one branch that seeded and flowered out and the rest of the tree had no seeds or flowers anywhere I’m really not sure what’s going on with the crape myrtle and I’m totally puzzled?

Shiela Carlson
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Shiela Carlson

Hi, I was going to top off my crepe myrtles until I found your blog. I will leave them alone. thank you

Judy
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Judy

One of my crepe myrtles has a good size sprout growing next to the trunk. Is it possible to dig this sprout up and transplant it into another location and grow another tree?

Tim
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Tim

This was a good article. I’ve also heard it called “crape murder,” either way it is hard to look at.

John Sparks
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John Sparks

Any advice for pruning new Natchez crape myrtles? We planned them as seedlings and they have grown well, but have branches spreading flat and wide. How do we prune them to grow multiple trunks as they gain height the first few years?

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