Before changing its routine, identify whether your starter is:

• Newly created from flour and water: its microbial community is still developing.

• Being reactivated from dehydrated starter: an existing culture is recovering from drying.

• Established but sluggish: its activity may have slowed after refrigeration, missed feedings, or changes in its environment.

These situations do not follow the same timeline. A starter made from scratch commonly needs two to three weeks, sometimes longer. Reactivating dried starter also takes several days, but it is a different process. We recommend judging readiness by repeated activity rather than a calendar deadline.

Check the temperature, feeding amounts, and time since feeding before deciding that the starter has failed. Cooler conditions slow fermentation; larger feedings generally take longer to peak. A refrigerated starter may need several refreshments before it performs predictably again.

We recommend marking its starting level, recording the feeding time, and keeping it at a steady, comfortably warm temperature. Amy Bakes Bread uses approximately 76–80°F when developing a starter; this is a useful working range, rather than a required temperature for every culture. Avoid unmonitored heat sources.

Bubbles show fermentation, but visible height also depends on how well the mixture holds gas. A very wet starter can bubble without developing a tall rise. Flour choice changes its consistency and appearance, too.

We recommend checking measurements before adding extra flour. Equal weights of flour and water are different from equal cups. Follow the intended hydration of your starter, and look for its pattern of activity rather than comparing its height with someone else’s jar.

An established starter normally rises, reaches its peak, and falls. Collapse alone does not mean it is dead.

A residue line above the current level can help show that you missed its peak. For dependable baking, we recommend using a refreshed starter near peak activity. A fully collapsed, sharply acidic starter is better refreshed before use when predictable results matter.

A starter made from scratch can have an early burst of activity—often around days two or three—followed by a quieter period. This early rise does not establish that it is ready to raise bread.

Continue the starter-building instructions, monitor temperature, and wait for reliable activity over several feeding cycles. This explanation applies to a new flour-and-water culture; we would not automatically use it to explain problems with a reactivated Rizzo starter.

Two possibilities deserve attention:

• What you observe

  • Liquid after prolonged storage or after the starter has risen and fallen; often smells alcoholic

  • Clear separation soon after mixing, particularly in a wet mixture

• Possible explanation

  • Hooch, a fermentation-related liquid commonly associated with an overdue feeding

  • Water separation

• Recommended response

  • Inspect for contamination, then refresh

  • Check weights, mixing, and intended hydration

Appearance alone cannot establish which liquid you have. Consider its feeding and storage history. Ordinary hooch may be stirred in or poured off; Colorado State University Extension accepts either approach, and That Sourdough Gal documents differing preferences. We would present this as a choice, not a universal rule.

These smells can occur during fermentation and often become stronger when a starter is overdue for feeding. They do not, by themselves, prove contamination.

For an established starter with persistent sharp acidity, we recommend retaining a measured small portion and feeding it fresh flour and water. That Sourdough Gal suggests a larger refreshment—for example, 5 g starter, 50 g flour, and 50 g water—to reduce the amount of acidic starter carried forward. That example is for a liquid starter, not a stiff-starter feeding formula.

Feeding more frequently can help when the starter is completing its fermentation cycle quickly. However, repeatedly discarding and feeding a weak starter before it has developed activity can dilute its microbial population.

We recommend observing its response before the next refreshment. For an established starter being strengthened, feeding around peak activity is more useful than repeatedly feeding simply because it has not risen yet. Follow separate instructions for initial reactivation or creation from scratch.

Feeding ratio and temperature work together:

• Peaks too early

  • Increase fresh flour and water relative to retained starter, or use a cooler location

• Peaks too late

  • Check for cold conditions; an established, healthy culture may suit a smaller feeding

• Timing Changes After Switching Flour

  • Allow several feedings to observe its new behavior

Keep the intended hydration consistent while adjusting the feeding size. We recommend stating ingredient names beside every ratio: sources differ in whether they write starter:flour:water or starter:water:flour, which matters when the flour and water amounts differ.

A liquid starter commonly loosens as fermentation progresses. An unusually runny mixture can also reflect excess water, different flour absorption, or an overdue feeding.

Check how it looked immediately after feeding compared with how it looks now. We recommend correcting measurements and refreshing consistently before making repeated changes to its hydration. A stiff starter begins with a dough-like texture, so liquid-starter descriptions should not be applied to it unchanged.

All-purpose and bread flour can maintain an established starter. Adding some whole wheat or rye flour may help a sluggish culture, but it can also alter its texture and fermentation speed.

If feeding and temperature appear appropriate and activity remains poor, trying suitable filtered or bottled water is reasonable. We recommend changing one variable at a time and recording the result; changing flour, water, ratio, and temperature together makes the cause harder to identify.

A missed feeding, an imperfect feeding amount, or brief neglect usually does not destroy a mature starter. Refrigeration helps extend the interval between feedings, although recovery may require more than one refreshment.

Inspect it before attempting recovery. Transfer a measured portion of uncontaminated starter to a clean jar, resume appropriate feedings, and wait for dependable activity before baking. A clean stainless-steel spoon is also acceptable; metal utensils do not automatically harm starter.

Discard it if you see fuzzy mold or pink or orange tinting, streaks, or patches. Do not scrape away mold and continue using the remaining starter. Clean the container thoroughly before restarting.

Dark liquid can be ordinary hooch, but dark fuzzy growth is a different concern. Smell alone cannot confirm safety, and uncertain surface growth should not be declared harmless from a description alone. Do not taste raw starter to assess it: flour is a raw ingredient that needs cooking.

The float test is a clue, not a definitive readiness test. Thick or whole-grain starters may sink despite being active.

We recommend assessing several signs together: repeatable expansion after feeding, bubbles throughout, a recognizable peak, and a normal fermented aroma. For a newly developed culture, look for this pattern over several consecutive feedings.