25 Common Sourdough Starter Troubleshooting Issues and How to Fix Them

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Starting a sourdough starter from scratch can be a rewarding journey, but it’s not always smooth sailing. Many home bakers encounter various issues along the way. In this comprehensive troubleshooting guide, we’ll address 25 commonly asked questions and issues that people face when creating a sourdough starter from scratch. Each problem will be accompanied by a possible solution to help you nurture a thriving sourdough culture. Even if you experience sourdough starter troubleshooting, it’s no reason to give up on the amazing journey of creating a precious heirloom and a self-sustaining way to make delicious bread!

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What Is a Sourdough Starter?

A sourdough starter is a naturally fermented mixture of flour and water that serves as the leavening agent in sourdough bread baking. It is a living culture of wild yeast and lactic acid bacteria that work together to produce carbon dioxide gas, which causes the dough to rise. The key characteristics of a sourdough starter are its ability to provide leavening and its unique sour flavor.

To create a sourdough starter, you typically mix flour and water and allow the mixture to ferment at room temperature. During this process, naturally occurring yeast from the environment and lactobacilli bacteria from the flour and your surroundings colonize the mixture. Over time, the starter becomes a stable and active microbial community.

Sourdough starters are known for their ability to impart complex flavors, aroma, and texture to bread. They can vary in flavor from mildly tangy to intensely sour, depending on factors like fermentation time, temperature, and the types of microbes present. A well-maintained sourdough starter can become a cherished kitchen companion, enabling you to bake delicious artisanal bread and other sourdough-based treats.

The Importance of Addressing Sourdough Starter Problems Promptly

When it comes to nurturing a thriving sourdough starter, prompt problem-solving is a key factor in achieving success. Sourdough starters are living cultures of wild yeast and lactic acid bacteria that require attention and care. Here are several compelling reasons why it’s crucial to address sourdough starter problems as soon as they arise:

  1. Preventing Contamination: One of the most common issues with sourdough starters is the risk of contamination, which can lead to off-putting odors, strange colors, or even mold growth. Promptly addressing these problems can help prevent contamination from spreading and potentially ruining the entire starter.
  2. Maintaining Flavor and Consistency: The flavor and consistency of your sourdough bread are heavily influenced by the health and vitality of your starter. Ignoring issues such as excessive sourness, unusual smells, or poor rising can result in subpar bread quality. Addressing these problems ensures that your sourdough bread maintains its desired characteristics.
  3. Time and Effort Savings: A well-maintained sourdough starter can save you time and effort in the long run. Neglected problems may lead to starter deterioration, requiring extensive efforts to revive or even necessitating a complete restart. Regular attention and problem-solving can prevent such setbacks.
  4. Consistency in Baking: If your starter is inconsistent in its performance, it can lead to unpredictable results in your sourdough bread. Addressing issues like slow rising or inconsistent bubbling helps you achieve more reliable and satisfying baking outcomes.
  5. Educational Opportunity: Troubleshooting sourdough starter issues provides valuable learning experiences. Each problem and solution encountered contributes to your understanding of sourdough fermentation, helping you become a more skilled and knowledgeable baker.
wet sourdough

1. Why isn’t my starter bubbling after several days?

Solution: Patience is key. If it’s only been a few days, give it more time. If after a week you see no activity, try using whole-grain flour or adding a pinch of yeast to kickstart fermentation. It takes time for wild yeast and bacteria to establish and become active in the starter.

2. My starter smells unpleasant, like rotten or vinegar. What’s wrong?

Solution: A strong vinegar smell usually indicates that your starter is hungry. Feed it with equal parts water and flour, discarding some of the old starter. If it smells truly rotten, it may be contaminated, so restart with fresh ingredients.

3. Why is my starter too thin or too thick?

Solution: Adjust the consistency by adding more flour if it’s too thin or more water if it’s too thick. Gradually make these adjustments during feedings until you achieve the desired consistency, similar to thick pancake batter.

4. I see a layer of liquid on top of my starter. Is it ruined?

Solution: This liquid is called “hooch” and is normal. Pour it off and continue with regular feedings. If it’s happening too frequently, reduce the time between feedings.

5. My starter doubled in size, but it’s now deflated. What should I do?

Solution: Your starter might be hungry. Feed it more frequently, maintain a consistent feeding schedule, and use warmer water to encourage yeast activity.

6. There are black or green spots on my starter. Is it mold?

Solution: If it looks fuzzy or smells off, it’s likely mold. Discard the entire starter, sterilize your container, and start over with fresh ingredients.

7. My starter is taking too long to rise. What can I do to speed up the process?

Solution: Keep your starter in a warmer environment, around 75-80°F (24-27°C). Use slightly warmer water when feeding, and consider using whole-grain flour to boost yeast activity.

8. The starter has a strange color. Is that normal?

Solution: A pink, orange, or brown tint can be harmless due to minerals in your water or flour. However, if it has an unusual color accompanied by off-putting odors, discard it.

my sourdough starter is runny

9. Why does my starter smell like alcohol or nail polish remover?

Solution: This indicates that your starter has produced too much alcohol. Feed it more frequently and reduce the time between feedings to balance the fermentation process.

10. My starter is not doubling in size. It’s just expanding slightly. What’s wrong?

Solution: Your starter might not have enough yeast activity. Try using whole-grain flour, maintain a consistent feeding schedule, and provide a warm environment to encourage yeast growth.

11. I forgot to feed my starter for a week. Is it dead?

Solution: It might look lifeless, but it can often be revived. Start with small feedings every 12 hours for a few days until you see signs of life. Once it’s active again, return to regular feedings.

12. The starter has a bitter taste. What can I do to fix it?

Solution: A bitter taste can be a sign of underfeeding or using water with chlorine. Feed your starter regularly, consider using filtered water, and discard any discolored portions.

13. My starter is overly sour. How can I reduce the sourness?

Solution: Shorten the time between feedings and use cooler water. Additionally, adjust your feeding ratio by using less starter and more fresh flour and water.

sourdough starter problems

14. Why is my starter not leavening my bread properly?

Solution: Ensure your starter is at its peak when you use it in recipes. It should double in size within 4-6 hours after a feeding. Adjust your feeding schedule if necessary.

15. The starter has an unpleasant odor, like acetone or glue. What’s happening?

Solution: This is usually a sign of stress in your starter. Feed it more regularly, and maintain a consistent feeding schedule to stabilize the fermentation process.

16. My starter is growing too quickly, and it’s overflowing the container. What should I do?

Solution: Use a larger container and reduce the amount of starter you maintain. This will give it more room to expand without overflowing.

17. The starter has a metallic taste. Is it safe to use?

Solution: A metallic taste may be due to your water source. Try using filtered or bottled water to feed your starter and see if the taste improves.

18. My starter has stopped rising, even though it used to. What’s wrong?

Solution: Your starter might be exhausted. Gradually reduce the amount of old starter you keep during feedings and increase the fresh flour and water to rejuvenate it.

19. Can I use tap water to feed my starter?

Solution: In most cases, tap water is fine, but if it contains high levels of chlorine or chloramine, it can affect your starter. Consider using filtered or bottled water to be safe.

20. I accidentally used self-rising flour in my starter. Is it ruined?

Solution: It’s not ruined, but self-rising flour may contain baking powder, which can interfere with the fermentation process. Transition to using all-purpose or whole-grain flour for future feedings.

21. My starter smells like rotten eggs. What’s happening?

Solution: A rotten egg smell could indicate the presence of sulfur compounds. It’s likely due to underfeeding or irregular feedings. Resume regular feedings and maintain a consistent schedule.

22. Why is my starter not getting any sourdough flavor?

Solution: Sourdough flavor develops over time. Be patient and continue feeding your starter regularly. It may take a few weeks to develop the desired flavor.

23. My starter is extremely sticky and hard to work with. What should I do?

Solution: Adjust the consistency by adding more flour during feedings until it becomes easier to handle. Aim for a dough-like consistency.

sourdough starter troubleshooting

24. The starter has a yeasty smell but no sourness. How can I make it more sour?

Solution: Increase the time between feedings, use cooler water, and try incorporating a longer bulk fermentation period in your bread recipes to develop more sourness.

25. I’ve followed all the advice, but my starter is still struggling. What can I do?

Solution: Sometimes starters just need more time. Be persistent and keep following the recommended feeding and care instructions. Consider seeking help from experienced bakers or sourdough forums for personalized guidance.


Starting a sourdough starter from scratch can be a challenging but ultimately rewarding experience. By addressing these common troubleshooting questions and issues, you can increase your chances of nurturing a healthy and active sourdough culture. Remember that patience and consistency are key to achieving that perfect loaf of sourdough bread. Happy baking!

Hey Beautiful! I’m Tara, garden enthusiasts, keeper of chickens, herbal homesteader and stay at home mom of 3 tiny humans and a sourdough starter named Ma. I love teaching others how to live a self-sufficient and sustainable life through homesteading, scratch cooking, and remembering to live barefoot, wild and free!

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