Sourdough Starter Feeding Troubleshooting

If your sourdough starter is not rising, smells unusually strong, or seems slow after shipping, don’t panic. Most starter problems can be corrected with consistent feeding, the right ingredients, and a little time. Use this guide to identify the likely cause and help your starter become active again.

How to feed a sourdough starter

For a simple maintenance feeding, use a 1:1:1 ratio by weight: one part starter, one part water, and one part unbleached flour. For example, mix 25 grams of starter with 25 grams of water and 25 grams of flour.

  • Measure ingredients with a kitchen scale rather than cups.
  • Mix thoroughly in a clean container.
  • Cover loosely so gas can escape.
  • Keep the starter at room temperature while you are working to make it active.
  • Feed approximately every 24 hours during recovery.

A recently shipped starter may be sluggish at first. Depending on temperature and feeding conditions, it can take several daily feedings to regain full activity.

Why is my sourdough starter not rising?

A starter that is not rising is often underfed, too cold, or still recovering from transit. Check these common causes:

  • Feeding by volume: Equal cups of flour and water do not weigh the same. Measuring by weight gives the culture a more reliable feeding.
  • Not adjusting the feeding amount: If you keep all of the starter, the amount of flour and water must increase as the starter grows. Discarding down to a small amount before each feeding makes the ratio easier to maintain.
  • Cool temperatures: Fermentation slows in a cool room. Keep the starter in a comfortably warm location, away from direct heat.
  • Unsuitable water: Heavily chlorinated water can inhibit fermentation. If your tap water is strongly treated, try a suitable bottled spring water or another reliable water source.
  • Flour choice: Start with fresh, unbleached flour. Bread flour or whole-grain flour can provide an extra boost for a sluggish starter.

Why does my sourdough starter smell bad?

A sharp, sour, vinegary, or acetone-like smell often means the starter is hungry. Fermentation naturally produces acids and aromas that change throughout the feeding cycle. Feed the starter at the correct ratio and monitor how the smell changes as activity returns.

If you see fuzzy growth, distinctly colored mold, or pink or orange streaks, discard the starter and begin again with a clean container. Do not taste a starter that shows signs of mold or contamination.

What does gray liquid on top mean?

A grayish or brown liquid on top, sometimes called “hooch,” can develop when a starter has gone too long between feedings. It is usually a sign that the culture needs food. Pour it off or stir it in, then retain a small amount of starter and feed it with fresh flour and water.

Why does my starter rise and then fall?

Rising and falling is normal. After a feeding, an active starter produces gas, expands, reaches a peak, and then falls as its food supply is used. A starter that has fallen by the next feeding is not necessarily dead. Look for bubbles, a pleasantly fermented aroma, and a repeatable rise after feeding.

How to revive a sluggish sourdough starter

  1. Place a clean container on a kitchen scale.
  2. Add a small amount of starter, such as 20 to 25 grams.
  3. Add the same weight of water and unbleached flour.
  4. Mix well, cover loosely, and keep at room temperature.
  5. Repeat every 24 hours, retaining only a small amount before each feeding.

If activity remains weak after several consistent feedings, try one feeding at a 1:2:2 ratio, such as 20 grams starter, 40 grams water, and 40 grams flour. Using bread flour or some whole-grain flour for a few feedings may also help.

Sourdough starter troubleshooting checklist

If your starter is still not improving, write down the answers to these questions:

  • What type and brand of flour are you using?
  • What water source are you using?
  • How many grams of starter, water, and flour are in each feeding?
  • How often are you feeding it?
  • Are you discarding before each feeding?
  • What is the approximate room temperature?
  • Do you see bubbles, rising, discoloration, or mold?

These details make it much easier to pinpoint the problem. Sourdough starters are resilient, and patience plus consistent feeding usually restores healthy fermentation. If you need help with your Living Dough starter, contact us with the details above and we’ll help you troubleshoot the next step.