puree

This is my first attempt at making wine, and I did purchase a winexpert kit. Fermentation is complete, and I just finished with stabilizing and degassing. Tomorrow, the instructions say it's time for clearning and adding the flavor bag, but I didn't want to add the flavor bag that came with the...

I am making a saskatoon (service berry), blueberry mix. I'm a bit short on berries so I am going to supplement with a little concord grape juice. Should I puree my berries before-hand, or just thaw and squeeze? Thanks