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Close-up view of a bubbly sourdough starter fed with whole wheat or freshly milled flour in a cream-colored bowl on a marble countertop.
Stephanie

How to Feed a Sourdough Starter with Whole Wheat or Freshly Milled Flour

Learn how to feed a sourdough starter using whole wheat or freshly milled flour. This easy method keeps your starter strong, active, and ready for baking. Perfect for beginners or anyone switching from all-purpose flour.
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Prep Time 2 minutes
Rest time 4-12 hours 4 hours
Total Time 4 hours 2 minutes
Servings: 1 Jar
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 50 grams starter
  • 50 grams whole wheat flour or freshly milled flour
  • 50 grams water filtered or dechlorinated

Equipment

  • Clean Jar
  • Wooden spoon

Method
 

  1. Add the whole wheat flour or freshly milled flour to the jar with your sourdough starter.
  2. Pour the water over the flour.
  3. Stir until everything is fully combined. Cover loosely and leave it at room temperature for 4 to 6 hours, or until bubbly and doubled.
  4. Optional: You can occasionally feed with rye flour, which is high in natural yeast and gives your starter a flavor boost.

Notes

Switching Flour Types

  • If your starter was originally built with all-purpose flour, you can switch to whole wheat or freshly milled flour at any time.
  • Transition gradually by feeding half all-purpose and half whole wheat for a few feedings.
  • After two or three feedings, your starter should be fully adapted to whole grain flour.
  • Many bakers rotate between bread flour and whole wheat depending on what they’re baking.

Storing and Maintaining a Healthy Starter

  • Keep your starter in a clean glass jar or crock.
  • Store it at room temperature if baking daily, or refrigerate between bakes.
  • Always feed it before refrigerating to keep it strong.
  • If you notice hooch forming, stir it in or pour it off, then feed as usual.