Cover the bowl with a breathable cloth. Why? If you want to make a sourdough based bread, whether from gluten producing flours or from gluten free flours you will need to make and maintain a starter. I have the book Classic Sourdoughs by Ed Wood, and I highly recommend it for anyone who's interested in baking with sourdough cultures. Once dehydrated, sourdough starter is as crisp and dry as crackers, able to be broken up and stored in an air-tight container as long as you like. Wherever you plan to store it, it’s best to first transfer it to a jar with a lid, however. Once a starter is well established, its acidity and biological activity will protect it from neglect. If you only keep one starter, keep it at room temperature and feed it smaller amounts until you are ready to use it, pouring out any excess when there is too much. I've corresponded with Jeffrey Hamelman about refrigerating focaccia dough made with a biga, and he told me he never refrigerates dough beyond 18 hours, but that after 24 hours you can expect significant changes in the dough's flavor. If you would like to store your sourdough starter for a much longer time than a couple of months, have a read of my article “How to Store Sourdough Starter Long Term”. How active was your starter when you added it to the mix? With each of these methods, you will always store your sourdough starter, loosely covered, in the fridge between bakes. +1 for 14 days as the upper limit in the fridge, but I'd say you'll definitely want to refresh before trying to make bread with a culture that old. The breads I now make with my 2-year-old sourdough starter are not very sour at all. How much sourdough starter do you keep on hand? That said, lots of variables in play. If you aren’t intending to use your sourdough starter every day, it is best kept in the fridge. The more starter you keep, the more flour and water you will have to feed it. It can sleep in your fridge for a long time. I always like to keep a pretty good amount of starter in the bowl, because there are certain no wait sourdough recipes that you can make like my sourdough skillet and sourdough pancakes. Then, you’d do what you could to keep your room temp or proofing box upwards of 80° F. For even faster times, you might go upwards of 90° F. Once you go above there though, you’ll likely run into some negative results with poor gluten development which will result in some pretty flat sourdough. Whether the baking hiatus is just a couple of weeks or you are taking a months-long break, sourdough starter can be safely preserved. Read through both methods and choose the one that works best for you. To do this, feed it as instructed above, seal the jar and then stand at room temperature for 2-3 hours (to help reinvigorate the yeast) before placing in the fridge to store. While I won't go that far, I will say that this view of sourdough is incomplete. (You can freeze it, dry it, or keep it in the fridge; Then you can return it to the refrigerator if you don’t plan to use it in the near future. All my recipes use 8 oz of either starter or discard. I know many people have 100-year old sourdough starters(!!). Once you have an active, thriving sourdough starter, most people will teach you to regularly discard part of it. How to Refrigerate Sourdough Starter . How long can you keep your starter on the counter while using it and feeding it? A. Sourdough starter that is used frequently can be maintained at room temperature, 70-85ºF is best. Generally up to 6 months. You may have missed seeing her feed the starter, it doesn't take long and really only has to be done every week or two if you aren't making bread regularly. 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