The Black Locust

Black Locust is a nitrogen-fixing tree with fragrant flowers and durable wood, but it spreads aggressively by root suckers.

Robinia Pseudocacia

Origin: Eastern U.S.

USDA Hardiness Zones: 3-8

Pros:

• Fixes nitrogen – improves poor soils

• Durable wood – rot-resistant, good for posts and fencing

Cons:

• Spreads aggressively – via suckers and seeds

• Thorny regrowth – difficult to remove once established