The Stanley Prune is a large, high quality plum with a dark blue skin and a greenish-yellow flesh. This prune plum tree is the #1 choice for prune fanatics but is excellent for canning and fresh eating as well. The Stanley Prune is a self-fertile plum that is an excellent pollinator for other plum trees. The fruit is finely grained and very sweet. The Stanley Plum Tree is cold hardy, very productive, and a reliable producer of fruit. Requires 700 chill hours. Ripens late August – early September.