Add 1 oz blueberry extract 15 min left in boil. Pitched yeast with starter at 60 degrees Add 1/2 oz blueberry extract after 2 weeks
Based on boiling 4.50 gallonsliters at 1.059 for 70 minutes, this will decrease your wort by 0.58 gallonsliters, bringing your after boil OG to 1.067. You were planning on an OG of 1.067 so you are right on track. Nice job!