Sourdough Starter Feeding Ratio: How to Feed and Maintain a Healthy Starter

A sourdough starter feeding ratio refers to how much flour and water you feed your starter compared to the amount of starter you keep. The most common is the 1:1:1 feeding ratio, meaning equal weights of starter, flour, and water. For example, 50g starter + 50g flour + 50g water.

The ratio matters because it controls:

• How fast your starter ferments (bubbles, rises, and falls)
• How sour your bread tastes (milder or tangier flavor)
• How often you need to feed your sourdough starter

Once you understand feeding ratios, you can adjust your sourdough feeding schedule to match your lifestyle—whether you bake every day or just once in a blue moon.

A feeding ratio is written like this: starter : flour : water. Everything is measured by weight using a kitchen scale. That’s the secret to a consistent, reliable, and happy starter.

Here are three common sourdough starter feeding ratios and what they’re best for:

Feeding Ratio Purpose Example (by weight)

1:1:1	Daily maintenance, active starter for frequent baking	50g starter + 50g flour + 50g water
1:2:2	Slower fermentation, slightly less sour, great for warmer kitchens	50g starter + 100g flour + 100g water
1:5:5	Long-term storage and very slow fermentation	50g starter + 250g flour + 250g water

All of these examples are roughly a 100% hydration starter, meaning equal parts flour and water by weight, giving you a thick, pourable texture like pancake batter.

For a strong, dependable starter, measuring by weight is non-negotiable. Cups and spoons can lie to you, but grams don’t. Place your jar on the scale, hit the tare (zero) button, and add starter, flour, and water according to your chosen ratio.

Pro Tip: No scale yet? Use cups in a pinch, but for consistent sourdough success, a small digital scale is one of the best tools you can buy.

If you never discard, your starter will grow like kudzu and eat your whole bag of flour. Discarding keeps the amount manageable and gives your wild yeast and bacteria fresh food.

Example: If you have 100g of starter, discard about half so you’re left with 50g. Then feed that 50g following your chosen sourdough starter feeding ratio.

Don’t throw that discard away, sugar! Use your sourdough discard for:

• Pancakes and waffles
• Crackers or flatbreads
• Biscuits, muffins, or quick breads

3. Choose the Right Feeding Ratio for Your Needs

Your ideal ratio depends on how often you bake and how warm your kitchen is:

• 1:1:1 ratio – Best for daily or every-other-day bakers. Starter ferments quickly and stays very active.
• 1:2:2 ratio – Great if your kitchen is warm or you want a slightly slower, more stable rise.
• 1:5:5 ratio – Perfect for long breaks between baking or when preparing a starter for cold storage.

You can switch between ratios anytime. If your starter seems too fast or too slow, adjust the ratio at the next feeding.

After you add flour and water, stir until there are no dry pockets. The mixture should look like thick pancake batter—smooth, stretchy, and not soupy.

• Too dry? Add a little more water, a teaspoon at a time.
• Too runny? Add a spoonful of flour until it thickens up.

A well-mixed starter traps gas better and rises more evenly, which is exactly what you want before baking sourdough bread.

• Feed your starter, let it sit for 1–2 hours at room temperature, then refrigerate.
• Feed about once a week with a 1:2:2 or 1:5:5 feeding ratio.
• Before baking, take it out, let it warm up, and give it 1–2 room temperature feedings until bubbly and active again.

• Feed your starter and let it start to rise.
• Place a portion in an airtight container or freezer-safe bag.
• To revive, thaw in the fridge, then give several regular feedings until it’s doubling in size again.

If your starter pours like water instead of thick batter, it may be over-hydrated or over-fermented.

• Use a thicker ratio like 1:2:2 or even 1:3:3 next feeding.
• Store it somewhere slightly cooler to slow things down.

Starter Not Bubbling or Rising

A sluggish starter usually needs more food, warmth, or nutrients.

• Feed your starter more frequently (every 12 hours for a few days).
• Move it to a warmer spot in your kitchen.
• Try switching to whole wheat or rye flour for a couple of feedings to boost activity.

Whew, sugar! That strong smell usually means your starter is overripe and hungry, not ruined.

• Discard most of it, keeping a small amount—about 20–30g.
• Give it a fresh feeding with a 1:2:2 or 1:3:3 ratio.
• Repeat every 12 hours until the smell turns yeasty, fruity, or pleasantly tangy again.

If you see fuzzy mold, pink, or orange streaks, it’s time to say goodbye.

• Do not try to scrape off the mold.
• Throw the starter out—it’s not safe to revive.
• Start a new sourdough starter from scratch with fresh flour and water.

Tips to Boost Sourdough Starter Activity

• Use whole grain flour: Switch to whole wheat or rye for extra nutrients and microbial action.
• Choose the right water: Use filtered, non-chlorinated water, slightly warm but not hot.
• Feed more often: If your starter is sluggish, try feeding every 12 hours until it’s lively.
• Keep a consistent routine: Starters love routine—same jar, similar temperature, and regular feedings.

With the right sourdough starter feeding ratio and a little love, your starter will be as lively as a fiddle at a barn dance. Whether you’re using a 1:1:1 ratio for daily baking or a 1:5:5 ratio for long-term storage, the secret is consistency and paying attention to how your starter behaves.

Just remember, sugar:

• Feed your starter regularly with a clear ratio.
• Adjust the sourdough feeding ratio to match your schedule and kitchen temperature.
• Store it properly at room temperature, in the fridge, or in the freezer.
• Use your sourdough discard creatively so nothing goes to waste.

Do that, and your sourdough starter will reward you with tall loaves, crispy crusts, and tender, tangy crumb—time after time.