Sourdough Feeding Schedule (Every Scenario)

A workable sourdough schedule fits both your kitchen and your baking plans. The same feeding can peak much sooner in a warm room than in a cool one, and changing the amount of retained starter changes the timing again.

The schedules below are starting routines for an established, unspoiled starter. If you are beginning with flour and water, follow the separate starter-building guide; early bubbles alone do not establish a mature culture.

The Basics of Feeding

Write feeding ratios in this order: retained starter : fresh flour : fresh water, by weight. A 1:2:2 feed could be 20g starter, 40g flour, and 40g water. That produces 100g in total.

The retained starter supplies microorganisms and fermented flour and water. Fresh flour supplies new substrate; water affects consistency. Temperature, flour, hydration, culture condition, and feeding ratio all influence fermentation. Within ordinary maintenance conditions, warmer starter usually matures sooner, but warming indefinitely is not a useful way to accelerate it.

With an active starter and otherwise similar conditions, increasing the fresh flour relative to the seed generally delays the peak. In King Arthur’s feeding-ratio comparison, larger feeds peaked later in the same warm environment. Those observations illustrate the direction of the change; their exact times are not a timetable for every jar.

Use a scale, mark the level just after feeding, and record when the starter reaches its highest point. A straight-sided container makes this easier. Note the actual room or starter temperature as well as the ratio.

Schedule 1: Frequent Baking at Room Temperature

If you bake most days, room-temperature maintenance keeps an active starter close at hand. King Arthur’s maintenance guide uses equal weights of starter, flour, and water, with twice-daily feeding as its room-temperature routine. It also allows reasonable flexibility around that schedule.

For a small 1:1:1 maintenance feed, keep 20g starter and add 20g flour plus 20g water. You will have 60g. Equal flour and water additions maintain 100% hydration when the seed is also at 100% hydration.

Watch several cycles before choosing your routine:

• If it peaks and collapses long before your next feed, try a larger feed ratio or a cooler location.
• If it has barely developed activity when the next feed is due, investigate temperature and culture condition instead of repeatedly diluting it on a rigid clock.
• If you need more starter for a recipe, build the required quantity separately while retaining enough to continue the culture.

Scaling a Larger Build

The proportions 100g seed, 500g flour, and 400g water form a 1:5:4 feed totaling 1,000g. A fifth-size version is 20g seed, 100g flour, and 80g water, totaling 200g. You do not need a kilogram of starter for routine home maintenance.

The fresh flour-and-water portion is 80% hydration, but the whole build is exactly 80% only if the seed is also 80%. With 100g of 100%-hydration seed, the larger build contains 550g total flour and 450g total water: about 81.8% hydration.

A larger feed can suit an overnight or workday interval, but learn its timing with your own culture before depending on it for a baking deadline. Whole-grain flour can change activity and aroma; it is an option, not a requirement for maintaining a healthy wheat starter.

Schedule 2: Weekend Baking and Refrigerator Maintenance

Refrigeration slows fermentation and makes less frequent feeding practical. Keep the starter covered in a clean container with room to expand. Weekly feeding is a useful starting routine for an established refrigerated starter, rather than a universal maximum survival time.

A simple weekly cycle is:

1. After baking or on maintenance day: Retain a small amount and feed with your usual measured ratio.
2. Before refrigerating: Allow the short room-temperature rest specified by your maintenance method. King Arthur’s guide uses about one to two hours before refrigeration.
3. Ahead of the next bake: Refresh at room temperature and observe the rise. Allow enough lead time for additional feeds if the culture is sluggish.
4. Mix the dough: Use the amount and maturity of starter called for by the bread recipe. Save some for the next cycle.

A recently active culture may need little preparation; a neglected one may need several refreshments. Two feeds are a planning option, not a biological reset that always restores full strength.

What Changes During Cold Storage?

An established starter can develop an alcoholic or sharper aroma as it goes longer between feeds. A layer of hooch is liquid that can contain water, alcohol, and other fermentation products; it is not pure alcohol. Hooch alone does not establish that a starter is spoiled, and its presence does not rule out separate contamination.

Do not diagnose the dominant microorganisms or acid concentrations from smell. A vinegary aroma does not prove that refrigerator storage has selected a particular group of bacteria. Inspect the whole culture before deciding to feed it.

Schedule 3: Vacation and Extended Storage

For a short absence, feed and refrigerate an established culture using the maintenance routine you already know. Longer storage may work, but condition after storage matters more than a promised month-long limit. Leave time to assess and refresh the starter when you return.

A dried backup is useful insurance before a longer trip. King Arthur’s drying method starts with a fed, active culture, spreads it thinly, and dries it completely before airtight storage. Label the backup and follow the rehydration method when needed. Drying time depends on layer thickness and humidity; do not pack it while it is still damp or flexible.

Do not rely on a backup made from an already spoiled culture. Freezing, drying, and feeding are not ways to clear contamination.

Schedule 4: Reviving a Neglected Starter

Discard the entire culture if it has visible mold, pink or orange discoloration, or a putrid smell such as rotting food. Do not scrape away a patch and take a spoonful from elsewhere. These discard criteria are supported by King Arthur’s starter troubleshooting booklet and Colorado State University Extension’s starter guidance.

For an established culture that appears unspoiled but has become sluggish:

1. Move a measured small portion to a clean container.
2. Feed using a familiar maintenance ratio, such as 1:1:1 by weight.
3. Keep it at a moderate, measured room temperature and mark its level.
4. Watch for developing activity and repeat refreshments according to its response.
5. Bake when activity is consistent enough for the recipe you intend to use.

There is no dependable “dead after five days” test, and revival cannot be promised by day three or day five. If the culture remains inactive, use the starter-not-rising troubleshooting guide to check conditions or begin again. Do not taste raw starter to assess safety; it contains raw flour.

Readiness: Observe More Than the Float Test

A floating spoonful has trapped enough gas to be buoyant. That does not demonstrate that the starter has reached its most useful stage for a particular dough. King Arthur’s float-test demonstration includes starter that floated before it was fully ripe.

Use the rise relative to the marked starting level, bubbles throughout, aroma, and repeatable behavior after feeding. Starter consistency and handling affect gas retention. Follow a recipe’s maturity instructions rather than treating floating as permission to bake or sinking as proof the culture is dead.

A starter that has begun to fall may still leaven bread. It can change timing or flavor, but collapse does not mean the yeast is exhausted or guarantee a flat loaf.

Feeding Ratio Cheat Sheet

These are weighed examples for an established starter, not guaranteed ripening times.

For a morning bake, test an overnight build on a day when timing is flexible. For an evening bake, record how a morning feeding behaves. Adjust one variable at a time rather than changing flour, seed quantity, hydration, and temperature together.

To slow a build, a smaller seed fraction or cooler location may help. To speed an established culture within a practical range, a larger seed fraction or moderately warmer location may help. Neither adjustment rescues a contaminated starter or guarantees a particular number of hours.

Temperature, Hydration, and Flavor

Sourdough flavor depends on the microbial community, available nutrients, refreshment history, dough fermentation, and baking as well as temperature and hydration. A table assigning “acetic dominant” to one room-temperature range and “lactic dominant” to another is too simple to predict an individual starter.

For less sharp bread, try using a regularly refreshed culture and a levain at the maturity specified by a mild-flavored recipe. Compare finished loaves while changing one factor. Do not shorten fermentation so far that the bread is underproofed simply to reduce sourness. For more context, see fermentation science.

A 100%-hydration starter contains equal total weights of flour and water; a 60% starter has 60g water for each 100g flour. Consistency also depends on flour. A stiff starter often needs different handling and observation from a liquid one, but hydration alone does not guarantee a slower peak or a particular acid balance.

Converting Hydration Accurately

Count what is already in the seed. For example, 20g of 100%-hydration starter contains 10g flour and 10g water. Adding 100g flour and 56g water produces 110g total flour and 66g water: exactly 60% hydration.

In the other direction, 20g of 60%-hydration starter contains 12.5g flour and 7.5g water. Add 100g flour and 105g water for equal totals of 112.5g flour and water: 100% hydration.

These are arithmetic examples, not tested maturity schedules. Observe how the converted culture behaves over subsequent feeds.

Common Mistakes

Using hot water to force activity. Choose water temperature to obtain a suitable finished starter temperature. Room-temperature water may be entirely adequate. Avoid hot spots and check warm cupboards or oven-light locations with a thermometer; turn off the oven and protect the starter from accidental preheating.

Treating discard as mandatory waste. Removing starter keeps the batch manageable and makes it easy to maintain a chosen ratio. You can instead use it in a recipe, or scale the next feed to match the amount retained. What matters is the proportion and condition of the culture, not a ritual of throwing some away.

Use discard from a healthy, established culture in pizza dough, scones, crepes, or waffles, following the recipe’s storage and cooking instructions. Spoiled starter is not a baking ingredient.

Expecting an exact clock. Similar feeding conditions make planning easier, but a missed hour is not an automatic failure. Keep a record and use the starter’s behavior to adjust.

When you are ready for a loaf, follow our beginner sourdough bread guide, including its fermentation cues.