Overview
Black Locust Bonsai (Robinia pseudoacacia) is a vigorous tree with compound leaves, rough bark, thorns and fragrant white flowers on mature trees. It is best suited to rugged informal upright, literati and naturalistic designs. For UK growers, treat it as: Outdoor.
Placement
full sun
Watering
water when the surface begins to dry; avoid constant wetness
Feeding and fertilising
feed modestly, as it can grow coarsely
Pruning and wiring
prune to control long internodes; beware thorns and brittle wood
Repotting
repot every 2-3 years in early spring
Propagation
seed, root cuttings and suckers
Pests, diseases and common issues
large compound leaves, suckers, borers, brittle branches and coarse growth