Blue Damson plum trees are one of the most popular old plum varieties in America. Yet they have become hard to find in local groceries, so more folks are deciding to grow their own trees from Willis Orchard's true to name stock. They are round to oblong in shape and have smooth, shiny, deep purple to black skin. The firm amber flesh is very tasty with a spicy, tart flavor. Blue Damson plums are great for fresh eating, cooking, jam, or making wine. The Damson Plum trees grow 12-15 feet tall, are self fertile, and require 600 chill hours.