Crepe Myrtle

Lagerstroemia indica is native to China, where it has been cultivated for centuries before spreading to Korea, Japan, and the Indian subcontinent.

• Native range: China (particularly southern and central regions), with subsequent naturalization across East and Southeast Asia
• Introduced to Europe in the 18th century and to the American South in the late 1700s
• The species has been cultivated in China for over 1,500 years, with records of ornamental use dating to the Tang Dynasty
• Today it is one of the most widely planted ornamental trees in the southeastern United States, where it thrives in the hot, humid summer climate
• The city of McKinney, Texas, and numerous other southern U.S. municipalities have designated it as an official city tree

The crepe myrtle is a deciduous shrub or small multi-trunked tree, typically reaching 3 to 8 meters in height, though some cultivars remain under 1.5 meters.

Bark & Trunk:
• One of its most distinctive features — the bark exfoliates (peels) annually in thin, papery flakes
• Underlying bark reveals smooth, mottled patches of gray, tan, cinnamon, and cream, providing year-round winter interest
• Multi-trunked specimens are common, with slender, arching stems

Leaves:
• Simple, opposite or sub-opposite, elliptic to oblong (2–7 cm long)
• Dark green and glossy during the growing season
• Autumn foliage turns brilliant shades of yellow, orange, and red before leaf drop
• Petioles are short (2–5 mm)

Flowers:
• Borne in large terminal panicles (10–30 cm long) at branch tips
• Each flower has 5 to 6 crinkled, crepe-paper-like petals (1.5–3 cm across)
• Colors range from white through pink, lavender, purple, and deep red depending on cultivar
• Prominent stamens are yellow, creating a striking contrast
• Blooming period extends from early summer through autumn (June to September in the Northern Hemisphere), providing months of continuous color

Fruit & Seeds:
• Small, dry, brown, globose capsules (~8–12 mm diameter)
• Capsules dehisce (split open) along 6 valves to release numerous small, winged seeds
• Fruits persist on branches through winter, adding ornamental interest

Crepe myrtles are warm-climate plants that thrive in regions with long, hot summers and moderate winters.

Climate Requirements:
• Best suited to USDA Hardiness Zones 7–10 (some cultivars hardy to Zone 6)
• Requires a long, hot summer to flower profusely — performs poorly in cool-summer climates
• Tolerates heat and drought once established
• Deciduous habit allows it to survive winter dormancy in cooler zones

Pollination & Wildlife:
• Flowers are pollinated primarily by bees and other generalist pollinators
• Attracts butterflies and hummingbirds
• Seeds are consumed by various bird species
• Provides light nesting habitat for small birds

Disease & Pests:
• Susceptible to powdery mildew (Erysiphe lagerstroemiae), particularly in humid conditions with poor air circulation
• Aphids and creep myrtle bark scale (Acanthococcus lagerstroemiae) can be problematic
• Modern cultivars (e.g., the U.S. National Arboretum's "Indian Tribe" series) have been bred for improved disease resistance

Crepe myrtles are generally considered non-toxic to humans and pets.
• Not listed as toxic by the ASPCA for dogs, cats, or horses
• No significant toxic compounds have been reported in the species
• However, ingestion of large quantities of any plant material may cause mild gastrointestinal discomfort

Crepe myrtles are among the most low-maintenance and rewarding ornamental trees for warm-climate gardens.

Light:
• Full sun is essential — minimum 6 to 8 hours of direct sunlight daily
• Insufficient light results in weak growth, fewer flowers, and increased susceptibility to powdery mildew

Soil:
• Adaptable to a wide range of soil types, including clay, loam, and sandy soils
• Prefers well-drained soil with a slightly acidic to neutral pH (5.5–7.0)
• Tolerates poor and compacted urban soils

Watering:
• Drought-tolerant once established (typically after the first growing season)
• During establishment, water deeply and regularly (once or twice per week)
• Overwatering or poorly drained soils can lead to root rot

Temperature:
• Thrives in summer temperatures of 27–35°C
• Hardy to approximately -15°C (Zone 7) for established plants
• Winter dormancy is essential for robust flowering the following summer

Pruning:
• Prune in late winter or early spring before new growth begins
• Remove dead, crossing, or inward-growing branches
• Avoid severe topping ("crepe murder"), which produces unsightly knobs and weak, whip-like growth
• Deadheading spent flower panicles can encourage a second flush of blooms

Propagation:
• Softwood or semi-hardwood cuttings (most common for cultivars)
• Seed propagation (for species types and breeding)
• Root suckers can be separated and transplanted

Common Problems:
• Powdery mildew — improve air circulation, choose resistant cultivars
• Aphids — treat with insecticidal soap or encourage beneficial insects
• Crepe myrtle bark scale — treat with systemic insecticides or horticultural oil
• Poor flowering — usually due to insufficient sunlight or excessive nitrogen fertilization

Crepe myrtles are valued primarily as ornamental plants but have additional practical applications.

Ornamental Uses:
• Specimen tree or focal point in residential and commercial landscapes
• Street tree and median planting in urban environments
• Mass plantings and hedgerows
• Container planting for patios and terraces (dwarf cultivars)
• Foundation plantings

Traditional & Medicinal Uses:
• In traditional Chinese medicine, various parts of L. indica have been used for their astringent properties
• Bark and leaves have been used in folk remedies for diarrhea and dysentery
• Some studies have identified anti-inflammatory and antioxidant compounds in the species

Wood:
• Wood is hard, fine-grained, and durable
• Used locally for small carpentry items, tool handles, and fence posts
• Not commercially significant as a timber species

Ecological Uses:
• Urban heat island mitigation through shade provision
• Erosion control on slopes
• Pollinator support in urban and suburban landscapes