Black Locust (Robinia pseudoacacia) is a fast growing leguminous tree that produces very rot-resistant heartwood. A natural alternative to pressure treated lumber, Black Locust wood is one of the best woods to use for fence posts, dock piers, wooden planters, outdoor furniture, or any other usage where it needs to hold up to the weather.
1 to 3 feet tall, bare-root.
Photo Credit: LIght Dim, CC0, via Wikimedia Commons