Black Locust
Robinia pseudoacacia · Hardwood
AI-generated identification · may be incorrect- Type
- Hardwood
- Origin
- Eastern North America, widely naturalized elsewhere.
- Hardness
- 1,700 lbf (Very Hard)
- Durability
- Very Durable (exceptional decay and rot resistance)
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Grain Pattern
Straight to irregular grain with a coarse, uneven texture.
Color & Appearance
Heartwood is a pale greenish-yellow to dark golden brown, darkening upon exposure to light; sapwood is a very pale yellowish-white.
Hardness (Janka)
1,700 lbf (Very Hard)
Durability & Decay Resistance
Very Durable (exceptional decay and rot resistance)
Value & Age
$3.00 to $6.00 per board foot for lumber.
AI estimate for general guidance only — not a professional appraisal. Actual value depends on grade, dimensions, condition, and local market demand.
- Wood Age Estimate
- Based on the provided image showing a living tree rather than a finished lumber sample, estimated maturity is approximately 30 to 50 years.
Common Uses
Fence posts, decking, shipbuilding, exterior furniture, railroad ties, and turned items.
Geographic Origin
Eastern North America, widely naturalized elsewhere.
Workability
Difficult to work with hand and machine tools due to extreme hardness and density; tends to blunt cutting edges quickly, but glues and finishes well.
Finish Recommendations
Takes oils and exterior finishes well, though pre-boring is required for nailing and screwing.
Notable Features
High shock resistance, extreme natural rot resistance without chemical treatment, and contains toxic compounds in its bark and leaves.
