Starter Day 6 — What to Expect and Next Steps

Day 6 of creating a sourdough starter: how your starter should look and smell, feeding strategy, and how to decide when it's ready to bake with.

What to Expect

By day 6 your starter should show consistent daily rise and fall, a pleasant tangy smell, and visible bubbles throughout. This page tells you how to test activity, adjust feedings, and decide whether to continue building strength or begin baking.

What you'll learn:

  • ✓ How to recognise reliable rise and fall patterns
  • ✓ A practical day-6 feed and how to adjust it
  • ✓ Simple tests to decide if your starter is ready to bake

💭 Some starters are ready on day 6, others need more time. Expect variability — it's normal and fixable.

What You Need

Must have:

Starter in a clear jar

Visible bubbles, some rise/fall over the last 24–48h in a glass jar for starter

⚠️ Return to earlier feeding schedule → more

Digital kitchen scale

Weigh feedings for consistent ratios

⚠️ Get a scale — inconsistent volumes cause variable activity

Warm, stable spot

Around 21–26°C (70–79°F) helps activity

⚠️ Use a [proofing box](https://amzn.to/4sSpelH) or the warmest place in your kitchen

Nice to have:

Why this day-6 approach works:

Consistency builds predictable microbes

Regular, measured feedings select for hardy yeast and lactobacilli that produce reliable rise rather than unpredictable gas patterns [1].

Moderate temperature speeds maturity

Warmer, stable temps accelerate fermentation safely; cold slows it and can require more days [2].

Simple feed ratio is forgiving

Using a modest refreshment keeps the starter vigorous without overwhelming acid buildup that can stall rise [1].

Ingredients

For: Day 6 feed (single refreshment)

Mature starter (from jar) 20g Discard remainder or use in discard recipes
Water 40g room temperature or ~25°C to encourage activity
Bread flour (or mix of bread and whole grain) 40g Use the same flour you've been feeding with for consistent results

Step by Step

Single 1:2:2 feed on day 6, observe 4–8h peak, run simple activity tests.

1

Discard and measure

Morning

Remove all but 20g of starter from your glass jar for starter. Discard or reserve for discard recipes.

✓ 20g remains in the jar; mark level with a rubber band or marker
2

Feed 1:2:2

Immediately after discard

Add 40g water and 40g flour. Stir with a jar spatula until homogeneous.

✓ Bubbles distributed through the mix; no large dry lumps
💡 Use your digital kitchen scale for exact amounts to keep the microbial balance consistent.
3

Mark and wait

Next 4–8 hours

Mark the level and observe rise. At peak the starter should be 1.5–2x the marked level and smell pleasantly acidic, not rotten.

✓ Visible dome or consistent rise in previous cycles indicates stability [1]
4

Perform the float test (optional)

At expected peak

Spoon ~1/2 tsp of starter into room-temperature water. If it floats, it often has enough gas to leaven a loaf.

✓ Floats within a minute = good candidate for baking; sinks → feed again and wait longer [1].
⚠️ Float test is a rough indicator; small starters or wetter starters may not behave perfectly.
5

If it peaks reliably

Either use within a few hours for baking or transfer to the refrigerator to slow activity and feed less often.

✓ Consistent peak time and smell over 2–3 days = ready to increase builds for bread [2]
6

If it doesn't peak or is inconsistent

Continue daily 1:2:2 feedings at a warmer spot, or increase refreshment frequency to twice daily. Use the same flour and cleanliness to avoid contamination.

✓ Bubbles increase and peak becomes more predictable after 1–4 additional days [1]

What If It Doesn't Work?

Day 6 oddities are common — here's how to interpret and fix them.

No rise or very slow activity

Likely: Too cool, weak inoculation, or too large discard

Fix: Move to warmer spot (21–26°C), keep feed ratio 1:2:2 or reduce discard so more microbes remain. Repeat daily [2].

→ More info

Very sour or alcoholic smell

Likely: Starter is starved between feedings or temperature high causing acetic production

Fix: Feed more frequently (every 12h) and keep at moderate warmth; reduce fermentation time before refrigeration [1].

→ More info

Pink/orange streaks or unpleasant rotten smell

Likely: Contamination

Fix: Discard the starter and start again. Clean jar thoroughly and use fresh flour and water [2].

→ More info

Starter peaks but sinks quickly

Likely: Weak gluten structure or too wet starter

Fix: Use slightly higher proportion of flour at feed (drier) or use a portion in a build (increase starter:flour ratio) before baking [1].

→ More info

💪 Most issues at this stage are fixable with temperature control and consistent measured feeds — keep notes and repeat.

Is it ready? What to do next

Starter peaks reliably in 4–8h and passes float test
→ Do a build for baking (increase volume with 1:4:4 or 1:5:5 to create enough active levain) and follow a beginner bread recipe
Starter is inconsistent but improving
→ Continue daily feed schedule for 2–4 more days and keep at warm spot
I want to understand the science
→ Read the microbial and enzymatic overview to learn why temperature, flour, and ratio matter
I want troubleshooting resources
→ See common problems and fixes

Sources

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