Sourdough starter gear guide
Updated June 2026Independently researchedNo paid placement.
For a sourdough starter, you really only need a glass jar or container, a kitchen scale that measures grams, and the right flour – preferably a whole-grain flour like whole wheat or rye for the initial boost. Everything else, like fancy proofing baskets or thermometers, is optional and can be added later as you get deeper into baking.
What container should you use for your starter?
A wide-mouth glass jar is ideal for maintaining a sourdough starter. It lets you see the bubbles and rising activity clearly, and it’s easy to clean. A quart-size mason jar works well because it’s tall enough to accommodate expansion without overflowing. Many experienced bakers simply reuse a pasta sauce jar or a similar vessel – as long as it’s glass and has a loose-fitting lid or cloth cover, it will do the job. Plastic containers can work too, but they tend to absorb odors and are harder to clean completely. Avoid metal bowls or containers, as the acidity of the starter can react with some metals over time. The key is that the container is large enough: when the starter is active, it can triple in volume, so give it headroom.
What flour works best for feeding a starter?
Whole-grain flours such as whole wheat, rye, or spelt are the most reliable for starting and maintaining a vigorous starter. They contain more of the natural yeast and bacteria that live on the grain’s surface and in the bran, which gives the starter a strong start. Once your starter is established, many bakers switch to unbleached all-purpose flour for a milder flavor, but they often keep a small whole-grain backup jar. You don’t need expensive specialty flours for feeding. Regular supermarket whole wheat or rye flour works perfectly. Organic flour is fine but not necessary – conventional flours are not typically treated with preservatives that would harm a starter. The most important thing is to avoid bleached flour, which can slow down fermentation because the bleaching chemicals inhibit yeast activity.
Do you really need a kitchen scale for sourdough?
Yes, a kitchen scale that measures in grams is one of the most important pieces of gear for sourdough. Dry measuring cups are wildly inconsistent depending on how you scoop or pack the flour, which can lead to a starter that is too stiff or too wet. A scale gives you reliable, repeatable results. You don’t need a fancy digital scale – a basic model that measures to the gram and can hold a reasonable weight (like a 500–1000g capacity) is sufficient. With a scale, you can feed your starter with a simple 1:1:1 ratio by weight (starter:flour:water). This consistency is what builds a healthy, predictable starter. If you try to eyeball or use cups, you’ll run into trouble when your starter seems sluggish or bubbles unevenly. A scale also makes it easy to discard the right amount rather than guessing.
Should you worry about temperature control for your starter?
Temperature significantly affects how fast your starter ferments, but you don’t need a dedicated proofing box or heating mat. A warm spot – around 70–80°F (21–27°C) – is ideal for a starter that rises predictably in 6–12 hours. Many people find a spot on top of the refrigerator, near a warm appliance, or in a sunny corner works well. A simple stick-on fridge thermometer can help you check the area without spending much. If your kitchen is very cold (below 65°F/18°C), the starter will take much longer to rise and may appear dormant. In that case, you can use a very simple trick: set the jar in a bowl of warm tap water (not hot) and change it every few hours. That’s often enough to keep things moving. Avoid microwaves or ovens with pilot lights unless you’ve checked the actual temperature – they can get too hot and kill the yeast.
How can you store your starter when you’re not baking often?
Once your starter is mature and reliably doubles within 8–12 hours of feeding, you can store it in the refrigerator for weeks at a time with minimal care. Simply feed it, let it sit at room temperature for an hour to start fermentation, then cover loosely and refrigerate. The cold slows down the yeast and bacteria, so it needs feeding only once a week or even less frequently – many bakers go two or three weeks without concern. When you want to bake again, take the starter out, feed it once or twice at room temperature to wake it up, and it will bounce back within a day. You don’t need any special storage containers or vacuum-sealed jars. Just a regular jar with a loose lid (to let gas escape) is perfect. A cloth cover held by a rubber band also works, but a lid that’s not fully tightened keeps the starter from drying out in the fridge.
Do you need special water for sourdough starter?
Tap water is perfectly fine for most people’s starters. However, if your tap water is heavily chlorinated, it can inhibit fermentation. The simplest solution is to let a glass of tap water sit out uncovered overnight – the chlorine will dissipate on its own. If your water is treated with chloramine (a more stable disinfectant), letting it sit won’t work; you’d need to use a water filter, bottled spring water, or buy inexpensive dechlorination drops from a pet store. Distilled water is not recommended because it lacks the trace minerals that yeast and bacteria need. Filtered water from a pitcher works great and is what many experienced sourdough bakers use. But honestly, if your starter is otherwise healthy and you don’t notice strange slowdowns, your tap water is likely fine. Start with what you have and only change water if you see a problem.
Frequently asked questions
Can I use tap water for sourdough starter?
Yes, in most cases. If your water is heavily chlorinated, let it sit overnight to dechlorinate, or use a simple filter. Avoid distilled water since it lacks minerals the starter needs.
How often do I need to feed my starter?
During the first few weeks, feed daily at warm room temperature. Once it’s mature, you can feed it once a day if you keep it out, or once a week (or less) if you store it in the fridge.
What’s the best temperature for starter activity?
Aim for 70–80°F (21–27°C). Below 65°F, activity slows a lot; above 90°F can kill the yeast. A consistent warm spot in your kitchen is usually enough.
Can I keep my starter in the fridge?
Absolutely. Once your starter is bubbly and predictable, you can feed it and refrigerate it for up to two weeks between feedings. Let it come to room temperature and feed it once before baking.
Do I need organic flour for a healthy starter?
No, conventional unbleached flour works perfectly. Organic flour is fine but not necessary. The main thing is to avoid bleached flour, which can strip away the good microbes.
How do I know when my starter is ready to bake with?
A mature starter should double in volume within 6–12 hours after feeding, smell pleasantly sour (not like acetone or cheese), and have a thick, bubbly consistency. A float test in water is a good quick check: drop a spoonful into water; if it floats, it’s likely active enough.