I am planning to pressure can a small batch of wort (2 gallons) for yeast starters. I will mash it to about 1.037 to 1.040. My question is, does anyone know if I could put the yeast nutrient in each quart jar before I can it? The canning temperature will be around 250 degrees. Will that high temp hurt the nutrient or should I wait on the nutrient until brew day?