How To Maintain A Sourdough Starter

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Congratulations! You’ve embarked on the journey of sourdough baking and successfully cultivated a lively sourdough starter. But what comes next? Knowing how to maintain a sourdough starter is essential for consistent and delicious results in your bread baking adventures. In this guide, we’ll walk you through the steps to feed, maintain, and store your sourdough starter like a pro.

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Whether you’ve crafted your sourdough starter from scratch or received an active one through purchase or as a gift, understanding how to nurture its vitality is essential. A sourdough starter has the potential to endure indefinitely, becoming a cherished heirloom passed down through generations. With each passing year, its flavors deepen, enriching with each loaf. Yet, to ensure a thriving starter that can delight not only you but also your descendants, mastering the art of feeding, storing, and maintaining your starter is paramount.

Whenever I’m talking to new sourdough mamas (or dadas), the one point I really want them to understand is that you have to make sourdough work for you, DON’T work for your sourdough. This means that it needs to be on your schedule, comfortability level, and lifestyle. If you don’t force the process to conform to your life, you could end up getting overwhelmed and burnt out on working for sourdough.

So while I’ll discuss some helpful ways and many options to maintaining your sourdough starter, ultimately you want to do what works for YOU in the period of life you’re in. Sometimes that means doing all these methods as life changes, and that’s ok. Sourdough is incredibly easy and very forgiving, so don’t stress yourself out with it.

how to store a sourdough starter

Understanding Your Sourdough Starter

Delving deeper into the essence of your sourdough starter is essential for its care and longevity. At its core, a sourdough starter is a symbiotic community of wild yeast and lactic acid bacteria, cultivated within a mixture of flour and water. This dynamic ecosystem undergoes fermentation, resulting in the production of carbon dioxide and lactic acid, which give sourdough bread its distinctive rise and tangy flavor.

To truly comprehend your starter means recognizing its responsiveness to its environment. Factors such as temperature, hydration levels, and the types of flour used can significantly impact its activity and flavor profile. As you become attuned to its nuances, you’ll gain the ability to nurture and manipulate your starter to achieve desired characteristics in your bread.

Moreover, understanding the lifecycle of your sourdough starter is crucial. From its humble beginnings as a mixture of flour and water, it undergoes stages of development, transitioning from initial inoculation to a mature and robust colony of microorganisms. Recognizing these stages empowers you to assess the readiness of your starter for baking and determine the optimal feeding regimen to sustain its health and vigor.

When is it ready for maintenance mode? A sure sign is its ability to reliably double in size within 4-8 hours after feeding. This indicates a robust colony of yeast and bacteria that’s ready to be sustained for long-term use.

how to maintain a sourdough starter

Choosing the Right Storage Location

Selecting the ideal storage environment for your sourdough starter is a pivotal decision that directly impacts its activity and longevity. There are two primary options: storing it on the countertop or in the fridge, each with its distinct advantages and considerations.

Countertop Storage

Storing your sourdough starter on the countertop at room temperature fosters an environment conducive to vigorous fermentation. This warm and stable setting encourages the proliferation of yeast and bacteria, resulting in a lively and active starter. This is why an immature starter is kept on the counter for at least 4 weeks while it builds the life inside.

By keeping your starter readily accessible on the countertop, you can effortlessly incorporate it into your daily baking routine without the need for prior preparation. This is incredibly helpful if you’re like me and incorporate your sourdough starter into every grain product you make. Any recipe with flour and water can be converted to a healthier option with sourdough, so it’s nice to have starter readily available and ready to go when needed.

However, it’s important to note that countertop storage requires regular attention and feeding. Due to the accelerated fermentation process at room temperature, your starter will demand daily replenishment to maintain its vitality and prevent over-fermentation. Additionally, ambient temperatures can fluctuate, influencing the speed of fermentation and necessitating adjustments to your feeding schedule accordingly.

Fridge Storage

Opting to store your sourdough starter in the fridge offers a more subdued and controlled environment, ideal for slowing down its metabolic activity. The colder temperatures of the fridge inhibit rapid fermentation, allowing you to extend the intervals between feedings.

This is particularly advantageous for those with busy schedules or periods of infrequent baking, as it provides greater flexibility and reduces the demands of regular maintenance. This is also helpful if you go on vacation or just need to take an extended break from sourdough.

However, refrigerated storage requires a brief period of acclimatization when transitioning your starter between temperatures. Before using a refrigerated starter for baking, it’s essential to allow it to reach room temperature and undergo a feeding to reactivate its dormant microorganisms. Additionally, while less frequent, regular feeding is still necessary to prevent the depletion of nutrients and maintain the overall health of your starter.

how to feed a sourdough starter

Feeding Your Active Starter

Feeding your active sourdough starter is the cornerstone of its maintenance, ensuring its continued vitality and performance in bread baking. This process involves replenishing the mixture with fresh flour and water, providing essential nutrients for the yeast and bacteria to thrive.

There are lots of different recommendations on the innerweb so how much a starter should be fed. Believe it or not, sourdough only needs a tiny bit of active culture to get it bubbly and thriving in a matter of hours. Ultimately, you want to find a feeding ratio that is best for your starter and the desired taste and hydration you’re after. However, I find that a 5:5:1 ratio of flour, water and starter is ideal for a few reasons;

  1. Provides an ideal balance of nutrients and hydration for your sourdough culture. This balanced composition ensures that the yeast and bacteria have an ample food source to thrive and propagate, promoting robust fermentation and flavor development.
  2. By consistently feeding your starter with equal parts flour and water, you maintain a stable hydration level within the mixture. This balanced hydration is crucial for supporting the metabolic activity of the microorganisms and facilitating the fermentation process. It also helps prevent dehydration or excessive moisture, which can adversely affect the health and performance of the starter.
  3. Using a small portion (10g) of active starter as the inoculant for each feeding helps regulate the growth and activity of the sourdough culture. This controlled introduction of starter ensures that the population of microorganisms remains balanced and healthy, preventing rapid depletion of nutrients and excessive acid production. It also reduces the risk of over-fermentation or sourness in the final bread.

Countertop Maintenance (Once a Day)

  1. Discard: Begin by discarding all but a small amount (about 10g) of your active starter. This prevents it from outgrowing its container and ensures a balanced fermentation.
  2. Feed: Add equal parts flour and water to the remaining starter (e.g., 50g flour and 50g water for a 100g total). Mix until well combined and cover loosely with a lid or cloth.
  3. Wait: Allow the starter to ferment at room temperature until it doubles in size, usually within 4-8 hours. Once doubled, it’s ready to be used in your favorite sourdough recipes.

Fridge Maintenance (Once a Week)

  1. Remove: Take your starter out of the fridge and allow it to come to room temperature for an hour or two.
  2. Discard and Feed: Discard all but a small amount of starter as with the countertop method. Then, feed it with equal parts flour and water (e.g., 50g flour and 50g water). Mix well and let it rest at room temperature until doubled in size.
  3. Refrigerate: Once doubled, return the starter to the fridge. It can now stay there for another week until its next feeding.
how to keep sourdough starter

Exploring Storage Options: Countertop vs. Refrigerator for Sourdough Starters

Choosing between storing your sourdough starter on the countertop or in the refrigerator involves weighing the advantages and disadvantages of each method. Both options offer unique benefits and considerations, catering to different baking preferences and lifestyles.

Countertop Storage


  1. Active and Readily Accessible: Storing your starter on the countertop keeps it at room temperature, providing optimal conditions for fermentation and microbial activity. This ensures that your starter remains active and ready for immediate use in baking without the need for prior acclimatization.
  2. Convenient for Daily Baking:With daily feedings, countertop-stored starters are always at the peak of their activity, making them ideal for spontaneous baking endeavors. The accessibility and immediacy of a countertop starter streamline the baking process, allowing you to incorporate freshly fed starter into your recipes without delay.
  3. Enhanced Flavor Development:The consistent and active fermentation of countertop-stored starters contributes to the development of complex and nuanced flavors in sourdough bread. The prolonged exposure to room temperature allows the yeast and bacteria to produce a wide range of aromatic compounds, resulting in bread with rich and distinctive flavor profiles.


  1. Demanding Maintenance Schedule:Countertop-stored starters require daily attention and regular feedings to maintain their vitality and prevent over-fermentation. This can be time-consuming and may not align with the schedules of busy bakers or those with infrequent baking habits.
  2. Risk of Over-Fermentation: The constant activity of countertop-stored starters increases the risk of over-fermentation, leading to excessively sour or acidic flavors in the final bread. Careful monitoring and precise feeding are essential to prevent the starter from becoming overly mature or acidic.
how and when to feed sourdough starter

Refrigerator Storage


  1. Extended Feeding Intervals:Storing your starter in the refrigerator slows down its metabolic activity, allowing you to extend the intervals between feedings. This is advantageous for bakers with busy schedules or periods of infrequent baking, as it reduces the demands of daily maintenance and provides greater flexibility.
  2. Conservation of Resources:Refrigerator-stored starters consume fewer resources, such as flour and water, compared to their countertop counterparts. The reduced metabolic rate at lower temperatures minimizes the frequency of feedings, resulting in less flour wastage and lower overall maintenance costs.


  1. Slow Activation Time:Refrigerated starters require a period of acclimatization and reactivation before they can be used in baking. This typically involves allowing the starter to come to room temperature and undergo one or more feedings to revitalize the dormant microorganisms. This process can prolong the preparation time for baking and may require advanced planning.
  2. Potential Flavor Alterations:The prolonged storage of starters in the refrigerator may affect the flavor profile of the final bread. While refrigeration slows down fermentation, it also limits the diversity of microbial activity and may result in bread with milder or less complex flavors compared to countertop-stored starters.

Maintaining a sourdough starter is a simple yet crucial aspect of sourdough baking. By following these steps, you’ll ensure that your starter remains healthy, active, and ready to create delicious bread time and time again. Whether you choose to store it on the countertop for daily use or in the fridge for less frequent maintenance, your sourdough starter will be your faithful companion on your baking journey. 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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