During summer months, I love buying fresh raspberries and blueberries. I often don't manage to work through the whole punnet, so I freeze the last few berries before they go off. Now the berries have piled up and I'm not so sure if it would work to make Jam with them?
Freezing can change the texture of the berries, but if you're cooking them down to make jam with, it shouldn't matter. Some recipes using frozen berries suggest preparing the fruit for this purpose (adding lemon or crushing strawberries), others start with pre-frozen fruit that had no special jam-related preparation.