Flavour & Fire
The Sourdough Journal
Drying & Preserving Your Starter
Not everyone bakes every day, and there is no need to. Sometimes your starter spends a few days in the fridge, sometimes you go away on holiday and leave it untouched for weeks. And if you want to keep it for much longer, you can even dry it.
The method that suits you best depends largely on how long you are not planning to bake. For shorter breaks, the fridge is usually all you need. For longer periods, a dried starter makes a useful back-up. The important thing is to make sure your starter is healthy and active before putting it away for an extended period.
The Fridge: For Most Breaks
For an established, healthy starter, the fridge is the simplest way to put daily care on hold for a while. The low temperature slows the activity of the yeasts and lactic acid bacteria considerably, so your starter moves through its available food much more slowly.
Feed your starter before putting it in the fridge and, if you like, give it a little time at room temperature for fermentation to get going again. Then place it in the fridge with a loose covering. Keeping a small mother starter is useful here, as it means you only need a little flour to maintain it while it is resting.
Exactly how long your starter can go without feeding depends on the starter itself, the temperature and the feeding ratio. A week is a practical starting point for an established starter, although some will manage longer. Rather than treating a particular number of days as a rule, pay attention to how your own starter behaves.
After spending some time in the fridge, it may have completely collapsed, developed a layer of liquid or smell noticeably more sour. None of these things necessarily means that it has been lost. Feed it again and see how it responds.
From Fridge to Baking Day
When you are ready to bake again, take your starter out of the fridge and give it some time to come towards room temperature. You can then keep part of it as your mother starter and use another part to build a baking starter for your recipe.
Give the baking starter one or more feedings, depending on how long it has been refrigerated, and wait until it is clearly active again. Bubbles, growth and a recognisable peak will tell you more than a fixed number of hours ever could.
If your starter has been resting for a longer period, it may take a few feedings before it rises reliably again. That is perfectly normal. For help recognising when it is ready to bake with, see Reading Your Starter.
Storing Your Starter during Holiday
If you are going away for a week or two, you usually do not need to do anything complicated. Feed your established starter, give it a little time at room temperature and then place it in the fridge, where it can slow down while you are away.
A longer holiday makes things a little less predictable. You can still leave your starter refrigerated and bring it back into activity when you return, but the longer it goes without fresh food, the more likely it is to need several feedings before its usual rhythm returns.
If you are going away for a much longer period, it can therefore be reassuring to keep a small dried reserve alongside your refrigerated starter. That way, you are not entirely dependent on one active jar.
Drying Your Starter
Drying is particularly useful if you want to keep a starter for a longer period or simply have a reliable back-up. A dried starter takes up almost no space and does not need feeding while it is stored.
Start with a healthy, active starter, preferably around its peak. Spread it into a thin, even layer on baking paper and leave it to dry completely at room temperature. Depending on the thickness of the layer and the surrounding conditions, this may take around 24 to 48 hours. The starter should be completely dry and brittle, with no soft or sticky areas remaining.
Once dry, break it into flakes or grind it more finely if you prefer, then store it in an airtight container somewhere cool, dry and dark. Do not use an oven or another heat source to speed things up; excessive heat can damage the living culture.
Adding a date to the container is a simple habit that becomes useful later. A well-dried starter can be stored for a long time, but no storage method can guarantee indefinite viability. The longer it is stored, and the less ideal the conditions, the less certain it becomes how much of the original culture will still be viable.
Bringing a Dried Starter Back to Life
When you need it again, begin by giving the dried starter water and then flour, allowing the culture to rehydrate and gradually become active again. Do not expect it to respond immediately like an established starter that has been fed regularly.
Give it time and several feedings if necessary. Eventually, you want to see the same pattern you recognise from a healthy starter: clear activity, growth, bubbles and a recognisable peak that returns consistently across several feedings.
The process is similar to building a starter again, but you are not starting entirely from scratch. You are giving a previously active culture the conditions it needs to come back to life.
Which Method Is Right for You?
For a short break, the fridge is usually all you need. If you are going on holiday, the same method will generally see you through, after which you can gradually bring your starter back to activity. If you will not be baking for a longer period, or simply want a reserve for peace of mind, drying is a useful addition.
Freezing is another possible back-up method, although it is less convenient than refrigeration and will usually require some attention after thawing before the starter becomes reliably active again.
There is no complicated storage system required. For most home bakers, a small healthy mother starter in the fridge is enough; a few dried flakes in a jar provide an extra layer of reassurance.
Your starter does not need to live permanently on the kitchen counter to remain part of your kitchen. Sometimes caring for it simply means knowing when to give it some food — and when to let it rest.
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