Queen Crape Myrtle

Lagerstroemia speciosa is native to tropical South and Southeast Asia, ranging from India and Sri Lanka through Bangladesh, Myanmar, Thailand, Laos, Cambodia, Vietnam, Malaysia, Indonesia, and the Philippines.

• Found naturally in tropical moist deciduous forests, often along streams and in valley forests
• Occurs at elevations from sea level to approximately 600 meters
• Has been cultivated in Indian and Southeast Asian gardens for centuries
• The species is particularly associated with the Deccan Plateau of India, where it is a prominent feature of dry deciduous forests
• First described scientifically by (Jack) Cochrane in 1977, based on earlier descriptions by William Jack in 1822
• Introduced to European horticulture in the early 19th century through British colonial botanical gardens
• Now widely planted as an ornamental throughout the tropics and subtropics worldwide
• Particularly popular in India, Southeast Asia, Hawaii, southern Florida, the Caribbean, and northern Australia
• Has naturalized in some tropical areas outside its native range
• In the Philippines, Banaba has been used in traditional medicine for centuries, and modern research has validated its blood sugar-lowering properties
• The tree is deeply embedded in Hindu mythology and is associated with various deities

Lagerstroemia speciosa is a medium to large, briefly deciduous tree with spectacular floral display.

Size and habit:
• Typically grows 10 to 20 meters tall, occasionally reaching 25 meters
• Trunk is 30 to 80 cm in diameter, with distinctive, smooth, mottled bark that peels in thin, papery flakes to reveal cream, gray, green, and brown patches
• Crown is densely rounded, with spreading branches
• The ornamental bark is beautiful year-round, even when the tree is leafless

Leaves:
• Simple, opposite to sub-opposite, oblong to elliptical, 10 to 25 cm long and 5 to 12 cm wide
• Dark green, leathery, with prominent veins
• New leaves emerge with a reddish-bronze tint
• Leaves turn vivid red to orange-red before dropping, providing excellent fall color in tropical settings

Flowers:
• Large, showy, 5 to 8 cm in diameter, with 6 (sometimes 5 or 7) crinkled, crepe-paper-textured petals
• Produced in massive, upright, branched panicles 20 to 40 cm long
• Flower colors range from deep purple to mauve, lavender-pink, to white
• The most common color is a rich, vibrant purple-mauve
• Stamens are numerous, long, and prominent, adding to the display
• Blooming occurs during the hot, dry season (typically March to June in India)
• Individual trees can remain in bloom for 2 to 3 months

Fruit:
• Woody, globose to ellipsoidal capsules 2 to 3 cm long
• Capsules split open when mature, releasing numerous small, winged seeds
• Capsules persist on the tree after opening

Lagerstroemia speciosa is an ecologically important species in tropical Asian forests.

Habitat:
• Native to tropical moist and dry deciduous forests, stream banks, and valley forests
• Often found in seasonally dry forests with a distinct dry period
• Tolerates a range of soil conditions
• Occurs from sea level to 600 meters

Ecological role:
• Flowers are a major nectar source for bees, butterflies, and sunbirds during the dry season
• Fruit provides food for birds and small mammals
• Large canopy provides shade and habitat for urban wildlife in tropical cities
• Leaf litter enriches soil organic matter
• The tree is a larval host for some butterfly species
• Seeds are wind-dispersed, allowing colonization of suitable habitats
• Can naturalize in tropical areas with suitable conditions
• In its native forest habitat, it is often a component of the canopy layer
• The species is relatively fire-tolerant, surviving ground fires in dry deciduous forests
• Plays a role in watershed protection along streams and rivers

Planting:
• Propagation from seed, cuttings, or air layering
• Seeds are tiny — surface sow on moist medium; germination in 2 to 4 weeks
• Semi-hardwood cuttings root readily with bottom heat
• Air layering produces well-rooted plants in 2 to 3 months
• Moderate growth rate — typically 30 to 60 cm per year
• Plant in full sun for best flowering — shade reduces flowering significantly
• Prefers deep, moist, well-drained, slightly acidic soil
• Adaptable to a range of soil types
• Hardy in USDA zones 10 to 12 — tropical; damaged by frost
• In marginal climates (zone 9), may freeze to ground but resprout from roots
• Water regularly during establishment; moderately drought-tolerant once established
• Fertilize in spring and summer with a balanced fertilizer
• Prune in late winter to shape and remove dead wood
• Relatively pest-free but can be affected by aphids, scale, and powdery mildew
• Excellent specimen tree for tropical and subtropical gardens
• Good street tree in frost-free areas
• Fall color is best when the tree experiences a brief cool, dry period

Uses:
• One of the world's premier ornamental trees — valued for spectacular flowers, ornamental bark, and vivid fall color
• Widely planted in tropical cities as a street tree, park tree, and garden specimen
• In the Philippines, Banaba leaves are one of the most important traditional treatments for diabetes — they contain corosolic acid, which has been scientifically shown to lower blood glucose levels
• Banaba leaf extract is now sold as a dietary supplement for blood sugar management worldwide
• Leaves are also used in traditional medicine for kidney problems, digestive issues, and weight management
• Bark is used in traditional medicine for diarrhea and fever
• Roots are used in traditional medicine for stomach ailments
• Wood is hard, durable, and reddish-brown — used for construction, furniture, and carving
• Wood is also used for making tool handles and agricultural implements
• Leaves are used as fodder for livestock
• The tree has religious significance in Hindu culture — associated with various deities and planted near temples
• In traditional Indian medicine (Ayurveda), the tree is used for diabetes management
• Commercial Banaba leaf harvesting provides income to rural communities in the Philippines
• The beautiful bark is used in traditional crafting