Techniques to make great homemade wine from Concord grapes. Ingredients for this lighter bodied 3-gallon Concord batch: 17 (or more) pounds grapes, 3 Campden tablets at start, 4 pounds sugar at start, 71b-112 yeast, 1.5 tsp pectic enzyme, 3 tsp yeast nutrient, 2.25 tsp calcium carbonate after 1st racking for moderately tart grapes, 1 to 3 cups sugar sweetening to taste, 3 Campden tablets and 1.5 tsp potassium sorbate at bottling