Common Name: black locust
Zone: 4 to 8
Height: 8.00 to 10.00 feet
Spread: 12.00 to 15.00 feet
Bloom Time: Rarely flowers
Bloom Description: White (rarely flowers)
Sun: Full sun to part shade
Water: Dry to medium
Tolerate: Deer, Drought, Clay Soil, Air Pollution
Easily grown in average, dry to medium, well-drained soils in full sun to part shade. Tolerates poor, dry soils and adapts to a wide range of soils and growing conditions.
This black locust cultivar is a deciduous, multi-stemmed shrub or small tree which is perhaps most noted for its shrubby growth habit, zigzag branching (more pronounced on new growth) and curling of some of the mature leaflets. It can be expected to grow to 8-10' tall with a spread of 12-15' over 30 years. It is sold by nurseries in several different forms: (1) a multi-stemmed shrub, (2) a single trunk tree or (3) a top-grafted tree to a 6' standard. Trees feature a loose crown and fail to develop a strong central leader. Features pinnately compound, dark green leaves (leaflets to 7/8" long) which turn yellow in fall. This cultivar rarely produces the racemes of fragrant white flowers in May or resulting seed pods that are typical of the species. Miniature spines occur on some branches, but are smaller and fewer than on the species. This plant was patented in 1996 under the cultivar name of 'Lace Lady' (PP9,771), but is currently being sold by nurseries under the trademarked name of TWISTY BABY.
Borers can be a significant problem in some areas. Also susceptible to scale, leaf miner, leaf spot, powdery mildew and canker. Branches are susceptible to winter injury from heavy snows or ice.
Both tree and shrub forms make excellent specimens and conversation pieces for small, prominent areas in the landscape. Shrub form is effective in shrub borders, foundations, woodland gardens or as a screen. Also may be grown as a container plant.