Black Locust is a medium to large deciduous tree with an irregular upright oval crown of bluish green leaves. Tree sucker to form colonies and are used for reclamation work. Locust borers and locust leaf miners limit usefulness in much of our region.
Plant Habit or Use:
Tree, medium tree, large tree
sun, partial sun
White, pea-like pendent racemes, fragrant, attractive
Flat pe-pod like legumes, brown, ripen in fall.
40 ft to 50 ft (100 ft)
20 ft to 40 ft
Explanation of the Earth–Kind® Index breakdown
- Heat Tolerance: High Heat Tolerance
- Water Requirements: Low Water Use
- Soil Requirements: Low Soil Requirements
- Pest Tolerance: Medium Pest Resistance
- Fertility Requirements: Low Fertility Requirements
USDA Hardiness Zones:
4, 5, 6, 7, 8, 9
Regions that intersect these hardiness zones:
Click image for enlarged map of USDA Hardiness Zones
Region A - Panhandle and High Plains• Region B - North and Central Texas• Region C - Northeast and East Texas• Region D - West Texas• Region E - Upper Rio Grande• Region F - Hill Country and Central Coast• Region G - Southeast Texas• Region H - Rio Grande Valley
Fixes nitrogen via symbiotic bacteria in roots. A favorite species for fence post production. Tends to naturalize readily outside its native range and can become a weed under certain conditions. Used heavily in strip mine reclamation and erosion control. Can develop chlorosis on high pH soils.