Refreshing Your Starter — A Beginner's Guide

How to refresh (feed) your sourdough starter reliably. Practical schedule, troubleshooting, and why each step matters.

What to Expect

This guide teaches a reliable routine to refresh your sourdough starter so it’s predictable and ready for baking. You’ll learn simple measurements, timing, and quick checks that tell you whether your starter is healthy.

What you'll learn:

  • ✓ How to refresh a starter to predictable strength
  • ✓ How feed ratios, temperature and time interact
  • ✓ Quick checks to know when your starter is ready for dough

💭 Refreshing is simple but requires consistency. Expect to get reproducible results once you control ratios and room temperature.

What You Need

Must have:

Active sourdough starter (any stage)

Existing starter of any vitality will respond to regular feeds

⚠️ Create a starter first → more

Kitchen scale

Accurate to the gram

⚠️ Buy one — weight-based feeding is the only reliably repeatable method

Glass jar or clear container

Wide mouth, straight sides help you see rise

Alternative: Use any clean clear container but mark the level

Nice to have:

Why this method works:

Weight-based feeding (not volume)

Flour density varies; weighing ensures consistent food for microbes [1]

Moderate feed ratio (1:3:3)

Gives yeast and bacteria room to grow within a predictable time window rather than starving or diluting them too much [1]

Timing tied to activity, not clock

Use doubling and peak signs rather than fixed hours — temperature changes alter kinetics [2]

Cold-storage option

Low-temperature storage slows fermentation and reduces feeding frequency while keeping the culture healthy [2]

Ingredients

For: Refreshed starter (approx. 200g total)

Mature starter 50g Taken from your jar after mixing
Bread or all-purpose flour 75g Whichever you normally use
Water (room temperature) 75g Preferably filtered; avoid chlorinated water
Optional: whole grain (rye) flour 10-20g Speeds activity when starter is sluggish

Step by Step

Measure → Mix → Observe → Use or store

1

Weigh and discard (if needed)

5 min

Scoop out about half of your starter (or use 50g as below). Use a jar spatula to keep the jar clean. Weigh with your kitchen scale.

✓ You have 50g of starter ready
💡 Discarding keeps total volume reasonable and prevents overly acidic conditions [1].
2

Feed by weight (1:3:3)

5 min

Add 75g flour and 75g water to 50g starter directly into the glass jar. Stir until uniform.

✓ No dry flour pockets; batter-like consistency
💡 Adjust hydration slightly if using whole-grain flour (it absorbs more water).
3

Mark and rest

Room temp until peak (4–8 h depending on temp)

Mark the level with a rubber band or marker on your glass jar and leave at room temperature. Ideal room temp ~21–24°C (70–75°F).

✓ Starter doubles or shows doming and many bubbles
💡 If cooler, expect slower rise; if warmer, expect faster peak [2].
4

Float test and readiness

1 min

Optional: drop a small spoon of starter into a glass of water in a clear straight-sided container; if it floats, it's aerated and ready to use in dough.

✓ Floats within a minute indicating good gas production
💡 Float test isn't perfect for all starters — use doubling and aroma as primary cues [1].
5

Use or refrigerate

Immediate or ongoing

If baking, use at peak. If not, cover and place jar in the refrigerator. In fridge, feed once per week for maintenance or more often at warmer fridge temps.

✓ For storage: starter shows slow activity in fridge but no foul odors
⚠️ If you store for long periods, feed weekly to prevent decline [2].
6

Reviving a sluggish starter

24–72 h

Do consecutive daily feeds at 1:2:2 with a small addition of whole-grain flour to boost microbial activity.

✓ Starter regains vigorous bubbling and predictable peaks
💡 Warm environment (26–28°C) accelerates recovery [1]

What If It Doesn't Work?

Common issues and how to interpret them:

Starter doesn't rise after feeding

Likely: Too cold, too dilute, or weak starter

Fix: Move to warmer spot, use slightly higher inoculation (e.g., 1:2:2), add 10–20% whole-grain flour, repeat [1]

Alcohol smell (hooch) on top

Likely: Starter is hungry / starved

Fix: Pour off hooch, feed immediately with 1:2:2 ratio, keep at room temp until active [2]

Pink/orange tint or unpleasant rotten smell

Likely: Contamination

Fix: Discard starter and start new — do not use for baking

→ More info

Starter is overly sour

Likely: Too long between feeds or high fermentation temperature

Fix: Use fresher starter (feed and use at peak), store in fridge between uses

💪 Small inconsistencies are normal. Tracking feed ratios and temperature for a few days will make the starter predictable.

What now?

Starter is reliably doubling
→ Make your first loaf
You want to learn why feeds matter
→ Read the science behind sourdough
You want regular maintenance tips
→ Learn feeding schedules
You want to avoid beginner mistakes
→ Common beginner mistakes

Sources

  1. [1]
    The Perfect Loaf – The Perfect Loaf – Link
  2. [2]
    Plötzblog – Plötzblog – Link