Tart cherries are doing very well this year at my Mom's house.
The tart cherry is a fruit that is melatonin-rich, used for pies, syrups and concentrates, and are the cherries sold in cherry pie filling. It is the preferred cherry in Europe and the one used in famous desserts such
as Schwarzwalder Kirschtorte, Black Forest Cherry Cake, see
They are available sweetened and dried like raisins at stores like COSTCO and my husband loves the dried ones as a snack. The tart cherries seem to help him sleep longer.