[Time of year available] Early to Mid September [Plum Variety] SHROPSHIRE PRUNE DAMSON [Description] 
An old English Damson, also known as 'Cheshire Damson', or 'Westmorland Damson'. The Parentage is unknown, but it is thought to have been originally found as a wild seedling which has been gathered and cultivated. The flesh is firm and very astringent, with one of the best damson flavours for jam making, and other cooking purposes.