there are different varieties of sour cherries . . .
I bought a lot of frozen tart cherries and I was told they are Montmorency, which is a variety that is good dried and fresh for pies. Sad to say, my cherries were rather lackluster in flavor; they tasted like the flavor had been watered down, like they had a bunch of rain just before picking.
My cherries came from the vicinity of Boring, Oregon. Maybe they did get too much rain. . . I have made two pies with them. The second pie I "doctored up" the cherry filling by making it with some condensed sour cherry juice, extra lemon juice and some Cherry Eau de Vie. I wish I did not have to doctor so much!
Where are your cherries from?