Crape Myrtle
Lagerstroemia Indica
Crape Myrtle, known botanically as Lagerstroemia Indica, is a stunning flowering shrub prized for its vibrant blooms and attractive bark. Native to Asia, it thrives in warm climates and is a favorite in gardens for its long-lasting flowers and ability to attract pollinators.
Everything it needs
9 essentials at a glance
Watering
Crape Myrtle prefers consistently moist soil, especially during the growing season.
Water deeply once a week, allowing the top inch of soil to dry out between waterings. In hotter months, increase frequency to twice a week. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf drop and wilting.
Light
Crape Myrtle thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placements include south or west-facing gardens. It can tolerate partial shade but may result in reduced flowering and leggy growth.
Soil
This plant prefers well-draining soil with a pH range of 5.0 to 6.5.
A mix of loamy soil with added organic matter, such as compost, is recommended. Ensure good drainage to prevent root rot.
Humidity
Crape Myrtle prefers moderate humidity levels, around 40-60%.
To increase humidity, consider misting the leaves or placing a humidity tray nearby. Signs of humidity stress include browning leaf edges and leaf drop.
Temperature
The ideal temperature range for Crape Myrtle is between 65-85°F (18-29°C).
It is hardy in zones 7-9 and can tolerate brief periods of heat up to 100°F (38°C) but may suffer in extreme cold below 10°F (-12°C).
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 or 20-20-20, applying every 4-6 weeks during the growing season.
Reduce feeding in fall and winter. Signs of nutrient deficiency include yellowing leaves and poor growth.
Pruning
Prune Crape Myrtle in late winter or early spring before new growth begins.
Use sharp, clean pruning shears to remove dead or crossing branches and to shape the plant. Deadheading spent flowers can encourage more blooms.
Repotting
Repot Crape Myrtle every 2-3 years or when it outgrows its container.
Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Choose a pot 1-2 inches larger in diameter and follow with fresh potting mix.
Propagation
Crape Myrtle can be propagated through stem cuttings or seeds.
For stem cuttings, take 6-8 inch cuttings in late spring, remove lower leaves, and place in a well-draining potting mix. Keep moist and in indirect light until roots develop. Seeds can be sown in spring after stratification.
When it's unhappy
Powdery Mildew
Why it happens
High humidity and poor air circulation can lead to this fungal disease.
How to fix it
Ensure good air circulation around the plant and apply a fungicide if necessary. Water early in the day to allow foliage to dry.
Leaf Spot
Why it happens
Fungal infections often caused by overhead watering.
How to fix it
Water at the base of the plant and remove affected leaves. Fungicides can help control the spread.
Aphids
Why it happens
These pests are attracted to new growth and can cause leaf curling.
How to fix it
Introduce beneficial insects like ladybugs or use insecticidal soap to manage infestations.
Scale Insects
Why it happens
These pests suck sap from the plant, weakening it over time.
How to fix it
Remove them by hand or treat with horticultural oil to suffocate the insects.
Root Rot
Why it happens
Over-watering or poorly draining soil can lead to root rot.
How to fix it
Ensure proper drainage and allow the soil to dry out between waterings. Remove affected roots and repot if necessary.
Care through the year
Spring
In spring, prune your Crape Myrtle to shape it and remove any dead branches. Fertilize with a balanced fertilizer to promote new growth.
Summer
During summer, ensure consistent watering, especially in hot weather. Monitor for pests and diseases, and deadhead spent flowers to encourage more blooms.
Fall
In fall, reduce watering as the plant prepares for dormancy. Clean up fallen leaves to prevent disease and consider applying mulch to protect roots.
Winter
In winter, protect your Crape Myrtle from extreme cold by mulching around the base. Avoid heavy pruning until late winter to prevent frost damage.
Toxicity & Safety
Crape Myrtle is non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. The bark and leaves are safe but should not be consumed.
Good to know
Why are my Crape Myrtle leaves turning yellow?
Yellowing leaves on Crape Myrtle can indicate over-watering or nutrient deficiency. Check the soil moisture and consider fertilizing if needed.
How often should I water my Crape Myrtle?
Water your Crape Myrtle deeply once a week, increasing to twice a week during hot summer months. Always check the top inch of soil for dryness first.
When is the best time to prune Crape Myrtle?
The best time to prune Crape Myrtle is in late winter or early spring before new growth begins. This helps shape the plant and encourages more blooms.
How can I encourage more blooms on my Crape Myrtle?
To encourage more blooms, ensure your Crape Myrtle receives full sun, prune spent flowers, and fertilize regularly during the growing season.
What pests should I watch for on my Crape Myrtle?
Common pests include aphids and scale insects. Regularly inspect your plant for signs of these pests and treat them promptly to prevent damage.
Can Crape Myrtle grow in shade?
While Crape Myrtle can tolerate partial shade, it thrives best in full sun. Insufficient light can lead to reduced flowering and leggy growth.
What soil is best for Crape Myrtle?
Crape Myrtle prefers well-draining soil with a pH of 5.0 to 6.5. A mix of loamy soil with organic matter is ideal for healthy growth.
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