I made a yeast starter a few days ago. i let it ferment for 3 days then put it in the frig, its been there for the last two days. I planned to brew today after bottleing a batch but didnt get around to it. How long is to safe to leave in the frig without havign to step it up or anythign before using it ?
You lose about 5% viability per week.
A week or less: I’d pitch it as-is.
More than a week: I’d wake it up with a little starter wort.
More than two weeks, I’d pitch it into a 1-litre starter.
More than a month, I’d put it in a full 2-litre starter.
I was thinking about the same thing just a few hours ago. Thanks for the info.
