Blueberries are sometimes tough to get started but well worth the time. For a 5gal batch I'd use no less than 17#'s of blueberries and run them through a food processor. Add 6tsp. yeast nutrient, 6tsp. acid blend, 1 1/4tsp. yeast energizer, and 32oz. red grape juice concentrate, 7#'s sugar or...