Locust Lumber: A Natural, Long-Lasting Alternative to Pressure-Treated Wood
When most people think about building outdoor structures — fences, garden beds, decks, or posts — they automatically reach for pressure-treated lumber. It’s common and it’s widely available. But there's a lesser-known, naturally rot-resistant option that might be a better choice for many applications: Black Locust Lumber.
At Grabeldinger Firewood & Logging, we occasionally come across high-quality locust and believe it deserves more attention — especially for landowners and builders looking for a long-lasting, chemical-free option. We keep these logs and have them sawn in local Central New York saw mills to fill unique orders.
What Is Locust Lumber?
Black locust (Robinia pseudoacacia) is a fast-growing, extremely dense hardwood native to the eastern United States — including parts of Upstate New York. Known for its twisted grain and tough structure, it’s one of the hardest and most rot-resistant native woods in North America.
In fact, black locust has been used for centuries in:
Fence posts
Docks & Piers
Breakwalls
Barn beams
Outdoor decking
Vineyard stakes
Trailer decking
Garden beds and raised planters
It’s especially prized for its ability to last 30–50 years in contact with soil — without any chemical treatment.
Locust vs. Pressure-Treated Lumber: Key Differences
Rot Resistance & Longevity
Locust: Naturally rot-resistant; lasts 30–50+ years in soil contact
Pressure-Treated: Chemically treated; typically lasts 15–25 years
Chemicals
Locust: No treatment needed — safe for gardens, animals, and skin contact
Pressure-Treated: Contains preservatives; not ideal for garden beds or food-related use
Strength & Durability
Locust: Extremely hard and dense; outlasts treated wood
Pressure-Treated: Softer pine base; adequate for most standard uses
Workability
Locust: Due to hardness and strength of the wood; pre-drilling and carbide blades recommended to make the projects easier.
Pressure-Treated: Very soft wood, can be prone to splitting.
Environmental Impact
Locust: Sustainable and biodegradable — no toxins, the scraps and building waste make great firewood.
Pressure-Treated: Often ends up in landfills due to chemical treatment
Appearance
Locust: Warm golden color with rustic grain
Pressure-Treated: Pale greenish tint; tends to weather gray
Common Uses for Locust Lumber
Because of its durability, locust is a great fit for:
Fence posts and livestock enclosures
Decking and patio framing
Raised garden beds where you want to avoid treated chemicals
Outdoor furniture
Trailer decking
Rustic structural posts or beams
Sourcing Locust Lumber Locally
Black locust isn’t mass-produced like pine, so it can be a little harder to find in big box stores. But we mill and stock locust logs for custom orders when we come across good stands or storm-downed trees.
Our slabs and boards are sawn locally, air-dried, and sold directly from us to you. If you're looking for small-batch, locally harvested lumber that holds up outdoors, Black Locust might be exactly what you need.
Interested in Locust? Let Us Know
If you're building a raised bed, fence, or rustic deck and want to avoid pressure-treated chemicals, ask us about locust. Availability is limited, but we're happy to notify you when we have a fresh load in stock. Delivery options available.
Call/Text: (315) 404-8978
Email: info@grabeldingerfirewood.com
🌲 Milled in Clinton NY, Serving and the Mohawk Valley and Upstate New York
