Scooter68
Fruit "Wine" Maker
I'm a lousy judge of when a blackberry is ripe so my wife has always done the picking. Blackberries I pick are typically just as you describe, they are black but they are certainly not ripe and sweet. That might be the issue for you all but if you are experienced berry pickers then, yeah that variety might just need more sugar. ( I don't have that problem picking Black Raspberries - when they are black and pull off easily I know they are ripe, but with blackberries the color doesn't really give me a good ripeness read.)
To prepare my fruit for fermenting - Of course first I crush or do whatever it takes to 'free the juice' then I just start adding sugar (simple syrup (2::1)) until I hit the amount it takes to get the starting SG I want. Since the sugar level varies, I just go that way instead of trying to do any math calculations beforehand.
At 25 pounds if those berries are anything like our here in NW Arkansas - you already have enough for a 5 gallon batch. Also I've always worked with the berries after they have been frozen and that makes the crushing a little easier once they are thawed.
To prepare my fruit for fermenting - Of course first I crush or do whatever it takes to 'free the juice' then I just start adding sugar (simple syrup (2::1)) until I hit the amount it takes to get the starting SG I want. Since the sugar level varies, I just go that way instead of trying to do any math calculations beforehand.
At 25 pounds if those berries are anything like our here in NW Arkansas - you already have enough for a 5 gallon batch. Also I've always worked with the berries after they have been frozen and that makes the crushing a little easier once they are thawed.