Brew day is soon and I was wondering if I should pitch a vial of yeast bay vermont (best before 22 July) into 20 litres of 1.045 wort or doing a starter 1 day before. Brewer's friend yeast calculator says I will be lacking 84billion cells without a starter, but I prefer to under pitch. Doing a 1 litre starter (which I understand is the minimum) without stir plate will give me 180 billion cells (target is 168). I want to get the most out of this yeast, any advice would be greatly appreciated.