Overview

Crepe myrtle (genus Lagerstroemia) includes deciduous shrubs and small trees grown for their long-lasting summer blooms, attractive smooth and peeling bark, and ornamental form. Native primarily to eastern Asia, the Indian subcontinent and parts of Australia, crepe myrtles have become important landscape plants where summers are warm and winters are not severe. They are used in parks, streetscapes, home gardens and containers because of their showy flower panicles, varied sizes and generally low water needs once established.

Identification and characteristics

Plants in this genus typically have a multi-stemmed habit with glossy leaves that may be single or clustered and that often take on yellow, orange or red tones in cooler seasons in some climates. Flowers are borne in terminal panicles; individual blooms have crinkled, crepe-like petals in shades from white and pale pink to deep magenta and red. After flowering they develop small, woody, many-seeded capsule fruits that often persist into winter. Smooth, exfoliating bark that reveals mottled new bark beneath is a notable and attractive feature on many mature stems.

History and nomenclature

The scientific name Lagerstroemia honors Magnus von Lagerström, an 18th-century Swedish collector who supplied plants to Carl Linnaeus. Several species were brought from Asia to Europe in the 18th and 19th centuries and subsequently introduced to North America. Some historical accounts credit the French botanist André Michaux with early introductions of crepe myrtle into the southeastern United States. Over the last century, breeders and horticulturists have selected and hybridized species to produce many cultivars with improved flower color, form and cold tolerance.

Cultivation and landscape uses

Crepe myrtles perform best in full sun and in well-drained soils; flowering is reduced in heavy shade. Many cultivars are relatively drought tolerant once established but benefit from regular watering during prolonged dry spells. Mature size varies widely among species and cultivars: some remain low and compact for small gardens, while others become small trees that provide summer flower display and winter bark interest. They are widely used as specimen plants, street trees, informal hedges and in mixed borders. Because many pollinators visit the blooms, they can contribute to urban and garden biodiversity.

Propagation and selection

Crepe myrtles can be grown from seed, cuttings or grafting, depending on the desired cultivar and uniformity. Softwood cuttings taken in warm seasons root readily for many garden varieties, while grafting is used commercially to maintain specific cultivar traits. When selecting plants, consider mature height, bloom color, bark character and local cold tolerance. Several species and hybrids are available: Lagerstroemia indica is widely cultivated in temperate climates, while other species such as L. fauriei and L. speciosa (banaba) contribute traits used in breeding programs.

Maintenance, pruning and common issues

Maintenance is generally straightforward. Avoid heavy, indiscriminate topping (a practice sometimes called "crepe murder") because it removes natural form, reduces flowering and can encourage weak regrowth. Instead, apply selective pruning to remove crossing branches, shape young trees and clear suckers. Common pest and disease issues include aphids (which can lead to sooty mold), powdery mildew on foliage in humid conditions, bark scale in some areas, and occasional leaf spot. Good siting for air circulation, appropriate watering and timely sanitation reduce problems.

Cold hardiness and regional considerations

Cold tolerance varies by species and cultivar. Some forms of L. indica are best suited to warm-temperate and subtropical climates, while hybrids incorporating genes from more cold-hardy species extend the range of reliable flowering farther north. In regions with harsh winters, choosing cultivars known for better cold performance and planting in protected locations improves survival and bloom reliability.

Notable species, uses and cultural notes

  • Lagerstroemia indica is the most commonly cultivated species in many temperate regions and has produced numerous named cultivars.
  • Hybrids involving species such as L. fauriei have improved cold tolerance and disease resistance for landscape use.
  • L. speciosa (banaba) is noted in some traditions for medicinal uses; different species have local cultural importance across their native ranges.

Overall, crepe myrtles are valued for their summer flower display, attractive bark and seasonal foliage color. With appropriate siting, selection and maintenance, they offer long-season interest and versatility in warm-temperate and subtropical landscapes.