Guides
Put your sourdough starter to sleep in the fridge (and wake it back up)
You don't have to feed a starter every day. Here's how to store it cold for one to four weeks on purpose, and the three-feed routine that brings it back to full strength.
Key takeaways
Feed, wait, chill
Refrigerate a few hours after a feed, while it's active.
Rest 1 to 4 weeks
Leave it alone; hooch on top is normal.
Discard + first feed
Pour off hooch, discard most, feed at room temp.
Feed twice more
Two to three feeds until it doubles reliably.
1. Feed it, then chill it near peak
The best time to refrigerate is a few hours after a feed, when the starter is active and rising but hasn't yet collapsed. It goes into the cold with plenty of food still available, so it slows to a crawl in a well-fed state rather than starving. A loose lid (not airtight) lets gas escape. Cold doesn't kill a healthy starter; it just slows the yeast and bacteria almost to a stop.
2. Leave it for one to four weeks
A week in the fridge needs nothing from you. Up to about a month is fine for an established starter, though the longer it sits, the more it acidifies and the more wake-up feeds it will want. Expect a layer of grey-brown liquid (hooch) on top after a while, that's alcohol the yeast produced, a sign it's hungry, not a sign it's dead. Pour it off for a milder result or stir it back in for more tang.
Cold is a pause button, not an off switch
A starter that's been fed and kept anywhere from cool to cold doesn't die; it dormants. The mistake that actually kills cultures is heat (above ~50C / 120F) or true starvation over months at room temperature, not a few weeks in the fridge.
3. The three-feed wake-up
Take it out, discard down to a small amount, and feed it at room temperature. The first feed after a long sleep is usually sluggish, that's expected. Feed again 8 to 12 hours later; you should see more life. By the second or third room-temperature feed it's rising predictably and roughly doubling, which means it's ready to bake. Don't judge a fridge starter by its first feed; judge it by the third.
FAQ
Frequently asked
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