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About Sourdough Starter Cultivation: Managing a Wild Microbial Culture

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You will learn to treat a sourdough starter as a controlled microbial ecosystem rather than a recipe ingredient. You will understand how wild yeasts and lactic acid bacteria establish a stable symbiosis, how competitive exclusion and falling pH select the final community, and how hydration, feeding ratio, flour choice, and temperature act as the levers that shift yeast-to-LAB balance and flavor. You will be able to read readiness signals quantitatively, store and revive a culture safely, and diagnose hooch, sluggishness, off-aromas, and genuine mold contamination from mechanism rather than folklore.