Black locust (Robinia)
Black locust (Robinia)
Robinia pseudoacacia
tree☀️ full-sun🪴 well-drained📏 tall🌡️ RHS H6
🌵 Thorny⚠️ Invasive
📋Quick Facts
Height
15.0-25.0m
Spread
10.0-15.0m
Care Level
👍 Moderate
Some experience helpful
Water
💧 Minimal watering
Every "12-18" days
Hardiness
Zone 3-8
About
Fast-growing nitrogen fixer with fragrant white flowers.
Top tip
Black locust is a nitrogen fixer; useful in tough sites but can spread, so manage suckers and seedlings.
Also known as: Black locust (Robinia), Robinia / acacia falsa, Robinia akacjowa, Robínia / falsa-acácia, Robinier faux-acacia, Robinia pseudoacacia, Robinie
Pest Resilience
4/5 — Good resilience
Few serious pests; locust borer and leaf miner occasionally but tree is resilient.
Visual Characteristics
Flowers
Yes
Blooms in Spring
The black locust (robinia) year in your garden
Dispatching imaginary bots to check your garden out...
What to do now
How to Propagate
✂️Cutting
ModerateThis plant produces viable seeds for propagation
🦋Wildlife & Garden Ecology
Pest Susceptibility
Pest resistantDisease resistant
Monitor for these pests and treat early if spotted
Hardiness Zones
H1a (tender)H7 (very hardy)
RHS H6
USDA 5–6 equivalent