Starter Feeding Charts
Adjust your starter feeding ratios based on ambient temperature and humidity to keep your levain and predictable throughout the year.
Your sourdough starter’s behavior changes with the seasons—not because it’s temperamental, but because microbes respond to temperature and moisture. In warmer weather, reduce hydration and feed more frequently to prevent over-activity and off-gas buildup. In cooler weather, increase hydration and extend the feeding window, as microbial activity slows. The goal is to match the food-to-microbe ratio to the metabolic rate.
Sluggish levain often shows as slow rise, weak bubble structure, or a flat, doughy texture after peak activity. First, check your feeding ratio: too much mature starter left behind can dilute microbial strength. Try increasing the fresh flour and water proportion instead of using a standard ratio. Also consider your flour: whole rye or whole wheat boosts activity more than white flour alone due to higher ash and nutrient content. Feed in the evening and use at its peak, typically several hours after feeding depending on temperature.
If your levain still underperforms, check your water—chlorinated tap can inhibit microbes over time. Let it sit uncovered overnight or use filtered water. Also ensure your container is clean but not sanitized with harsh chemicals; residual detergent can kill yeast. A simple test: feed a small batch and watch for doubling within a few hours at typical room temperature. If not, refresh the starter twice more before using it in dough. Consistency matters more than intensity.
