Damson/ˈdæmzn/ Definition 1 of 3Pro Tip 1/3Seasonal Reference Damsons are in season late summer to early fall, often used in seasonal recipes. We always pick damsons for our traditional autumn preserves. Pro Tip 2/3Tart Flavor Damsons taste tart and slightly astringent, ideal for sweetening in desserts. The damsons added a perfect tartness to the fruit salad. Pro Tip 3/3Jam Ingredient Damson is commonly used to make jam due to its rich flavor and high pectin. Damson jam is my grandmother's specialty.