Drive through almost any Charleston neighborhood in late winter and you will see it. Rows of crape myrtles chopped back to thick, knobby stumps. Gardeners call it crape murder, and Clemson Extension agrees it is unnecessary. Crape myrtles bloom heavily without it, and topping leaves them weaker and uglier for years. Good crape myrtle pruning in Charleston takes less work than most people think. Here is when to do it, what to cut and how to fix a tree that has already been topped.
Why crape myrtles get topped in the first place
Crape myrtles are one of the signature trees of the Lowcountry. They handle our heat, bloom for months in summer and show off smooth, peeling bark in winter. Topping usually happens for one of three reasons:
- The tree was planted in a spot too small for its mature size
- Someone believes hard cutting makes more flowers
- It has simply become a neighborhood habit
The flower idea has a grain of truth. Crape myrtles bloom on new growth, and hard cuts force a flush of long new shoots with big flower clusters. But those shoots are thin and whippy. When the heavy blooms open, especially after a summer rain, the branches bend over and sometimes break. The tree looks top heavy and floppy instead of graceful.
What crape murder does to the tree
Clemson Extension describes topping as severely damaging to the plant's appearance. Over time it causes:
- Knuckles or knobs. Swollen growth forms where the same cut is made year after year.
- Weak branch attachments. New shoots grow from just below the cut and are poorly anchored.
- Lost structure. The natural vase shape and smooth, sculptural trunks disappear.
- More sprouting. The tree pushes out a thicket of shoots that need more pruning, not less.
- Openings for decay. Large cuts heal slowly and can let in rot.
None of this is necessary. A crape myrtle that is never topped will still flower well.
When to do crape myrtle pruning in Charleston
Clemson recommends pruning crape myrtles in late winter or early spring, while the tree is dormant and before new growth begins. In the Charleston area that usually means February into early March. The bare branches make it easy to see the structure and pick the right cuts.
Summer is for light work only:
- Deadheading. On smaller trees, Clemson notes that removing spent flower clusters right after they fade can encourage a second round of bloom.
- Sucker removal. Pull or cut sprouts at the base whenever they appear.
Avoid heavy pruning in late summer and fall. Cuts made then push new growth that may not harden before winter.
What to cut and what to leave
Think of crape myrtle pruning as editing, not chopping. Clemson's list of what to remove is short:
| Remove | Why |
|---|---|
| Dead or damaged branches | Health and safety |
| Crossing or rubbing branches | Prevents bark wounds |
| Shoots growing toward the center | Opens the canopy to light and air |
| Suckers at the base | Keeps the trunks clean |
| Lower side branches, to about a third or half the height | Shows off the trunks and bark |
| Seed heads within reach (optional) | Neater look, possible rebloom |
How to make the cuts
- Cut back to a branch or the trunk. When removing a limb, cut just outside the branch collar, the slightly swollen ring where the branch joins the larger stem. Do not leave a stub, and do not cut flush into the collar.
- Cut above a bud when shortening. For deadheading or small heading cuts, make the cut just above an outward facing bud.
- Use clean, sharp tools. Hand pruners for small shoots, loppers for mid size branches and a pruning saw for anything thicker.
- Choose three to five main trunks. Most tree form crape myrtles look best with a few well spaced trunks. Remove extra trunks at the ground while the tree is young.
A common guideline is to avoid cutting branches much thicker than a pencil when shaping the canopy. Thicker cuts usually mean you are topping, not thinning.
Choosing the right size crape myrtle
Most crape murder starts with a planting mistake. A variety that wants to be 25 feet tall will not stay 10 feet tall without constant cutting. Crape myrtles range from dwarf shrubs a few feet high to trees over 30 feet. When planting new ones, check the mature height and width on the tag, and match the variety to the space. If a tree is too big for its spot, replacing it with a smaller variety is often better than topping it every year.
How to fix a crape myrtle that has been topped
It takes a few seasons, but a topped crape myrtle can be brought back to a natural shape.
- In late winter, look at the knobs. Each knob will have a cluster of shoots coming from it.
- Pick the best two or three shoots on each knob. Choose ones that point up and outward, are well spaced and are firmly attached.
- Remove the rest back to the knob.
- Repeat the next year. Keep thinning so the chosen shoots grow into proper branches.
Another option is to cut the trunks down near the ground and let the tree regrow. Select a few strong new sprouts as the future trunks and remove the rest. It sounds drastic, but crape myrtles regrow quickly in our climate.
Right Stuff Lawn Care handles crape myrtle pruning as part of late winter tree and shrub work, using the thinning approach described here. For timing on the rest of your landscape, see our guide on when to prune shrubs in the Lowcountry. Palms follow very different rules, covered in our article on palm tree trimming in Charleston. Our month by month lawn care calendar puts all the seasonal jobs in one place.
Frequently asked questions
When should I prune crape myrtles in Charleston?
Late winter to early spring, while the tree is dormant, is best. In the Charleston area that usually means February or early March, before new leaves appear. Light deadheading and sucker removal can happen in summer.
Does cutting back crape myrtles make them bloom more?
Hard cutting forces larger flower clusters on long, thin shoots, but those branches often droop and break under the weight. Clemson notes that crape myrtles produce plenty of flowers without heavy pruning. Untopped trees bloom well and hold their shape.
Is it bad to top crape myrtles?
Yes. Topping creates knobs, weak branch attachments and a mass of sprouts that need even more pruning. It also removes the natural shape and hides the attractive trunks. Thinning cuts back to a branch or trunk are the better approach.
How do I get rid of suckers on my crape myrtle?
Remove them as soon as you see them. Clemson suggests pulling young, green sprouts off by hand when possible, which leaves a cleaner base than cutting. Older, woody suckers can be cut flush with the trunk or root.