Haven't posted in awhile, but recently cracked my first bottle of Blackberry wine made about 10 months ago --- WOW, it was as good or better than blackberry wine from a local winery. Gave a bottle to some close friends and they were amazed, too.
Used a one gallon recipe with 3 lb. frozed blackberries and a quart of Welch's Grape Juice for added body. Sweetened it somewhat before bottling.
My only regret is that I only have 3 more bottles. At least I kept good records and should be able to duplicate. This time, though, I should have fresh blackberries as I now have a good crop growing in my back yard.