Crape Myrtle Care Guide
By Richard "Woodie" Buller, GGD co-founder with 35+ years in horticulture
Published On: Feb 28, 2023
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When summer settles in, and many spring-flowering plants have finished their show, crape myrtles come into their own. Their ruffled flowers bring color to sunny gardens during the months when patios, porches, and backyards are most used.
Flowers are only part of their appeal. Depending on the variety, crape myrtles also offer colorful new growth, dark summer foliage, autumn color, and smooth, peeling bark. Their branching adds interest after the leaves fall.
The choices extend well beyond the familiar flowering tree. Crape myrtles range from compact shrubs to substantial landscape specimens, giving gardeners several ways to enjoy their summer display.
The most useful decision happens before planting: choose a variety whose eventual size fits your space.
"Choose your crape myrtle for the space you have, then enjoy its natural shape. The right plant saves you years of unnecessary pruning." — Woodie
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Understanding Crape Myrtle Trees and Shrubs
Crape myrtles belong to the genus Lagerstroemia. Many garden selections come from Lagerstroemia indica or hybrids involving related species.
They are deciduous, meaning they lose their leaves for winter. Flowers develop on the current season's growth, with bloom timing influenced by variety, weather, and climate.
Some selections naturally form low, rounded shrubs. Others develop into tall, upright plants that can be maintained as multi-trunk or single-trunk trees.
What Is the Difference Between a Crape Myrtle Tree and Shrub?
The distinction involves both genetics and training.
A smaller-growing cultivar may naturally suit a shrub border. A taller cultivar can develop a tree-like canopy as selected lower branches are gradually removed.
However, removing lower branches does not turn a compact variety into a tall tree, and repeatedly cutting down a large variety does not make it a naturally compact shrub.
Choose the cultivar's mature size first. Then decide how much of its trunk structure you want to reveal.
Choosing Crape Myrtle Trees and Shrubs
Start with height and width, then consider flower color, foliage, and the role the plant will fill.
A flowering shrub beside a patio needs different proportions than a specimen tree in an open lawn. Both deserve enough room to develop without constant size reduction.
| Variety | General landscape role | Flowers and foliage | Size considerations |
|---|---|---|---|
| Dynamite Crape Myrtle | Flowering tree or large multi-stem specimen | Vivid red summer flowers | Commonly listed around 15–20 feet tall; allow substantial canopy space |
| Red Rocket® Crape Myrtle | Upright flowering tree or large shrub | Bright red flowers; reddish spring growth | A larger selection requiring generous room |
| Tuscarora Crape Myrtle | Specimen tree or large multi-stem plant | Coral-pink flowers and attractive mature bark | Can reach approximately 20 feet tall and 15 feet wide |
| First Editions® Twilight Magic™ Crape Myrtle | Upright large shrub or small tree | Pink flowers against deep plum foliage | Approximately 12–14 feet tall and 6–8 feet wide |
| Purple Magic® Crape Myrtle | Rounded flowering shrub | Dark purple flowers and glossy green foliage | Approximately 7–8 feet tall and wide |
| Plum Magic Crape Myrtle | Large flowering shrub or small specimen | Fuchsia-pink flowers; plum-colored new growth matures green | Allow approximately 12–14 feet tall and 8–10 feet wide |
| Coral Magic Crape Myrtle | Rounded shrub for sunny borders | Salmon-pink flowers; reddish new foliage | Approximately 8–10 feet tall and 6–8 feet wide |
| Double Feature® Crape Myrtle | Rounded flowering shrub | Ruby-red flowers and wine-red new growth | Approximately 6–8 feet tall and wide |
These dimensions are planning estimates, not permanent limits. Age, climate, and growing conditions affect eventual size.
Choosing a Tree Form
Dynamite, Red Rocket, and Tuscarora suit locations where a flowering canopy can develop above surrounding plants.
Position them where their branches can spread without repeatedly interfering with a roof, walkway, or driveway. Give mature trunks room to be seen, especially when bark is part of the variety's appeal.
Twilight Magic offers a smaller upright option with strong foliage contrast. Its dark leaves remain part of the display between flower flushes.
Choosing a Shrub Form
Purple Magic, Coral Magic, and Double Feature provide summer color closer to eye level. They work in mixed borders, substantial foundation beds, and informal flowering hedges.
Plum Magic also has a shrubby habit, but it needs considerable room. The word "shrub" does not necessarily mean a plant will fit beneath a window.
For smaller beds, compare the expected width as carefully as the height.
Where Do Crape Myrtles Grow Best?
Full Sun Encourages Flowering
Choose a location that receives at least six hours of direct summer sunlight, with six to eight hours preferred for strong flowering.
Shade can reduce bloom, encourage branches to stretch, and contribute to some disease problems. Consider how nearby trees will affect sunlight as they grow.
A crape myrtle planted in a sunny opening today may receive much less light several years later.
Good Drainage Protects Roots
Crape myrtles tolerate several soil textures, including clay, where drainage is adequate. They perform best when roots have moisture without remaining saturated.
Avoid low spots that collect water. If drainage is poor, improve the broader site or select another location rather than trying to solve the problem within a single planting hole.
Use a soil test before making substantial pH or fertilizer adjustments.
Give the Canopy Space
Allow room between plants and structures so branches can develop naturally.
This is particularly important for shrub selections, which may become nearly as wide as they are tall. A broad flowering shrub squeezed into a narrow strip will soon require more maintenance than expected.
Crape Myrtle Hardiness and Winter Expectations
Many crape myrtles perform reliably in Zones 7–9, while certain selections are marketed for colder or warmer regions.
At the colder end of their range, distinguish root survival from dependable survival of the trunks and branches. A plant may survive below ground while losing much of its upper growth.
This matters when you want a permanent tree form. Repeated winter dieback can keep a taller variety growing as a resprouting shrub.
Choose a cultivar with a record of local performance, especially in Zone 6. A sheltered, sunny location can help, but it does not eliminate the risk of winter injury.
When to Plant Crape Myrtles
Plant when the soil is workable and you can provide consistent follow-up care.
In colder parts of their growing range, spring planting is often a practical choice because it provides a growing season before winter. In milder climates, early fall can also work well.
Container-grown plants may be planted during the summer, but heat increases the need for moisture checks. Avoid frozen, saturated, or severely dry soil.
How to Plant Crape Myrtle Trees and Shrubs
Prepare a Wide Planting Hole
Dig a hole at least twice as wide as the root ball.
Locate the uppermost substantial roots before determining depth. The root flare—the area where the trunk broadens into the roots—should sit at or slightly above the surrounding soil level.
Keep firm soil beneath the root ball so the plant does not settle too deeply.
Inspect the Roots
Remove the nursery container and inspect the root system. Loosen circling roots and correct tightly bound roots as needed with clean tools.
If the root ball is dry, moisten it thoroughly before planting.
Backfill With the Existing Soil
Position the plant upright and backfill primarily with the soil removed from the hole.
Avoid creating a pocket of heavily amended soil surrounded by dense native soil. When broader soil improvement is needed, address the planting area rather than only the hole.
Water and Mulch
Water thoroughly after planting. Spread approximately 2–3 inches of organic mulch over the surrounding soil, keeping it several inches away from trunks and stems.
A broad mulch area also helps protect thin bark from mower and string-trimmer damage.
How Far Apart Should Crape Myrtles Be Planted?
Use the variety's expected mature width as your starting point.
For individual specimens, allow enough separation to appreciate each canopy. For an informal flowering hedge, plants can eventually approach one another, but avoid crowding them to create an immediate screen.
A shrub expected to grow 8 feet wide extends roughly 4 feet from its center. Beside a building, it needs growing room plus practical clearance for access.
Tree forms also need overhead space. Account for utility lines, roof edges, and vehicle clearance before planting.
Watering Crape Myrtles
Newly planted crape myrtles need regular moisture while roots establish.
Check the original root ball and the nearby soil. Water slowly when the root zone begins to dry, allowing moisture to soak into both.
Frequency depends on rainfall, temperature, soil texture, and plant size. A calendar alone cannot tell you whether the roots need water.
Established plants tolerate dry periods better, but prolonged drought can reduce flowering and cause stress. Water the root area during extended dry weather rather than relying on frequent, shallow sprinkling.
Keep checking young plants through dry autumn weather while the ground remains unfrozen.
Fertilizing Crape Myrtles
Crape myrtles do not need heavy feeding to flower well.
Use soil-test results and plant performance to decide whether fertilizer is necessary. Nearby lawn fertilizer may already supply nutrients to their roots.
Excess nitrogen can encourage leafy growth at the expense of flowers. Adding more fertilizer is, therefore, a poor first response to a plant that is growing vigorously but blooming lightly.
If feeding is warranted, follow the product label and avoid stimulating tender growth late in the season.
"If a healthy crape myrtle gives you leaves but very few flowers, check its sunlight and feeding history before reaching for another bag of fertilizer." — Woodie
How to Prune Crape Myrtle Trees
A well-placed crape myrtle generally needs modest pruning.
Late winter or early spring, before new growth begins, is the usual time for structural work. Remove damaged branches and selectively address rubbing or crowded growth.
For a tree form, retain well-spaced trunks or a suitable central trunk. Gradually remove selected lower branches as the plant develops rather than stripping a young plant excessively.
Trim unwanted basal shoots while they are small. Make branch-removal cuts just outside the branch collar.
Why Topping Is a Problem
Topping removes major branches or trunks at arbitrary points, often leaving thick stubs.
The resulting shoots can be crowded and poorly attached, and repeated cutting spoils the branching that makes mature crape myrtles attractive.
Crape myrtles can flower without this treatment. If annual topping seems necessary to keep a plant within its space, consider replacing it with a smaller cultivar.
How to Prune Crape Myrtle Shrubs
Preserve the natural outline of shrub selections.
Remove dead or damaged stems, selectively thin crowded growth, and make limited shaping cuts as needed. Avoid repeatedly shearing the entire plant into a tight block.
A shrub form should retain enough lower growth to look balanced. Removing all of its low branches simply because crape myrtles are sometimes grown as trees can undermine the effect you chose it for.
Should You Remove Spent Flowers?
On manageable plants, removing faded flower clusters can encourage additional flowering in suitable conditions.
Purple Magic, Coral Magic, and Plum Magic are examples of varieties with rebloom potential. Results depend on growing conditions and the remaining season.
Deadheading is optional. Mature trees do not need every old flower cluster removed to remain healthy or flower again.
Why Is My Crape Myrtle Not Blooming?
Start with light. A plant that receives too much shade may grow leaves without producing a satisfying flower display.
Next, consider the season and cultivar. Crape myrtles are summer bloomers, and their starting dates vary.
Other possible causes include drought, excessive nitrogen, repeated pruning of developing shoots, winter dieback, and establishment stress.
Look at the entire situation before treating the plant. Poor bloom is not proof that it needs a bloom-boosting fertilizer.
Growing Crape Myrtles in Containers
Smaller selections can grow in substantial containers, provided the pot supports the developing root system and drains freely.
Use a suitable container potting mix, and monitor moisture closely during warm weather. A potted plant can dry much faster than the same variety growing in a garden bed.
Consider its eventual weight and winter location before planting. A large flowering shrub in a watered container can be difficult to move.
Roots in pots have less winter protection than roots in the ground. Near the plant's cold-hardiness limit, plan additional root protection or an appropriate sheltered overwintering location.
Crape myrtles are deciduous plants that normally go dormant; they should not be managed like tropical foliage houseplants.
Common Crape Myrtle Problems
| Symptom | Possible explanation | What to examine |
|---|---|---|
| White powder on leaves or flower buds | Powdery mildew | Sunlight, airflow, and cultivar resistance |
| Dark leaf spots and early leaf drop | Possible Cercospora leaf spot | Leaf symptoms and seasonal progression |
| Sticky foliage with a black coating | Honeydew and sooty mold | Aphids or scale insects |
| White, felt-like clusters on bark | Possible crape myrtle bark scale | Trunk furrows, branch forks, and pest identification |
| Upper branches remain bare while basal shoots grow | Possible winter dieback | Bud activity and living tissue after spring growth begins |
| Sparse flowers | Shade, stress, excess nitrogen, or pruning | Site conditions and recent care |
Powdery Mildew and Leaf Spot
Choose varieties with improved disease resistance where possible. Resistance reduces risk but does not make a plant immune.
Provide adequate sun and spacing, and avoid unnecessary overhead irrigation. Identify the disease before deciding whether treatment is warranted.
Aphids, Honeydew, and Sooty Mold
Aphids and some scale insects produce sticky honeydew. Sooty mold grows on that residue, leaving foliage or bark looking blackened.
Identify the insect source rather than treating the black coating as the primary problem. Beneficial insects can help suppress pest populations.
Crape Myrtle Bark Scale
Watch for white or gray felt-like deposits on trunks and branches, often accompanied by honeydew and sooty mold.
Confirm the identification before treatment. Some beneficial insect larvae have a waxy appearance and can be mistaken for pests.
Significant infestations on mature trees may need professional assessment. Treatment timing and product choice should follow current local guidance.
Late Leaf-Out and Winter Damage
Crape myrtles often leaf out later than surrounding trees and shrubs. Bare branches in early spring do not automatically mean the plant is dead.
Allow time for the weather to warm and growth to begin. After a damaging winter or spring freeze, wait until living and dead portions become clearer before removing large sections.
If the roots survive but trunks die, new basal shoots may rebuild the plant. Regaining its former size can take time, and repeated dieback may prevent a lasting tree form.
Are Crape Myrtles Deer Resistant?
Crape myrtles are often considered relatively resistant to deer browsing, but local feeding patterns vary.
Young plants and accessible growth may still be damaged. Protect new plantings where deer pressure is high, and watch for rubbing damage on young trunks.
Deer resistance should be one consideration alongside climate, mature size, and site suitability.
A Few Words From Woodie
"Some crape myrtles belong in a flower border, and others need room to become a tree. Match the plant to its job, then let the flowers and branching do the work." — Woodie
Good results come from choosing carefully and observing the plant through the seasons. Notice how much sunlight reaches it, how the soil dries, and when new growth begins.
Those observations make care decisions easier and help you appreciate more than the summer flowers.
Final Thoughts
Crape myrtle trees and shrubs offer summer color at several landscape scales. A rounded flowering shrub can brighten a border, while a larger specimen adds canopy, bark, and branching to an open garden.
Choose for mature size, provide full sun and good drainage, and prune with restraint. With those foundations in place, crape myrtles can become a lasting part of the summer landscape.
Recommended Internal Links
- Crape myrtle trees: Link to the tree collection.
- Crape myrtle shrubs: Link to the shrub collection.
- Red-flowering crape myrtles: Link naturally to Dynamite or Red Rocket.
- Dark-foliage crape myrtle: Link to Twilight Magic.
- Purple-flowering crape myrtle shrub: Link to Purple Magic.
- Coral-pink crape myrtle shrub: Link to Coral Magic.
- Reblooming red crape myrtle shrub: Link to Double Feature.
Shop the Crape Myrtle Collection
Frequently Asked Questions
1. What is the difference between a crape myrtle tree and shrub?
Cultivar size and training determine the form. Some varieties naturally remain shrubby, while larger selections can develop tree-like canopies. Pruning does not change a cultivar's genetic size potential.
2. Do crape myrtles need full sun?
Yes, full sun produces the strongest flowering. Aim for at least six hours of direct summer sunlight, with six to eight hours or more preferred.
3. When should crape myrtles be pruned?
Perform necessary structural pruning in late winter or early spring before growth begins. After winter injury, wait until surviving growth becomes clear before removing questionable branches.
4. Do crape myrtles need to be cut back every year?
No. Properly selected plants generally need only selective pruning. Avoid annual topping, and choose a cultivar that can reach its natural size in the available space.
5. Why is my crape myrtle not flowering?
Possible causes include insufficient sunlight, drought, excess nitrogen, pruning, winter damage, or establishment stress. Check growing conditions before adding fertilizer.
6. Can crape myrtles grow in Zone 6?
Some selections can survive in Zone 6, but winter damage to branches and trunks is possible. Root survival does not guarantee a permanent tree form, so choose varieties with proven local performance.
7. Can crape myrtles grow in pots?
Smaller varieties can grow in large, well-drained containers. Monitor moisture and plan winter protection because container roots are more exposed to cold than roots in the ground.
8. Why has my crape myrtle not leafed out in spring?
Crape myrtles naturally leaf out late. Allow warm weather and bud activity to clarify the plant's condition. Persistent bare branches or growth only from the base may indicate winter damage.
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