Black locust grows 20-25 m tall with a 30-60 cm breast height diameter. The growth slows down after 25 years, and so it is customarily harvested at the age of 25-40 years. Its thick, greyish-brown bark has net-like crevices. Black locust develops relatively straight, cylindrical trunks in closed stands. The cultivation of special strains, like the straight “shipmast locust” variety, increasingly get greater attention.