My recipe used 18 pounds of crushed blackberries, 12 pounds of sugar total, two crushed campden tablets, and I forget the kind of yeast except it is a regular wine yeast and it took two packets. This is for a five gallon recipe. I am told blackberries have a lot of natural yeast but because the sources of the starter are questionable (animal urine for example) it is best to use the campden tablets to purify. Here is the site for the recipe I used. http://www.familyherbalremedies.com/blackberry_wine_recipe.html
Thank you for the information and the link. I bet 18 lbs. of blackberries takes awhile to pick. I’m not sure that I can get that many this late in the year, although we’ve picked a bunch this year. Something to try in the future for sure.