The 5‑Day Plan to Grow a Strong Sourdough Starter for Perfect Crusty Bread

A fresh starter feels like a tiny, alive kitchen pet. Feed it, watch it bubble, and soon you’ll have the foundation for the best crusty loaves you’ve ever baked. Here’s a friendly, no‑fuss plan that I use every time on Sourdough Stories.

Day 1 – Gather Your Supplies

What you need

100 g whole‑wheat flour (or rye for extra boost)
100 g lukewarm water (about 90 °F)
A clean glass jar (at least 500 ml)
A loose lid or cloth

The first mix

Put the flour and water in the jar.
Stir until there are no dry spots. The mixture should look like thick pancake batter.
Cover loosely so air can get in but dust stays out.
Let it sit at room temperature (around 70 °F) for 24 hours.

Don’t worry if nothing happens today. The microbes are just waking up.

Day 2 – Look for Signs of Life

After 24 hours you might see a few bubbles or a faint sour smell. That’s a good sign.

Feeding #1

Discard half of the mixture (about 100 g).
Add 50 g whole‑wheat flour and 50 g water.
Stir well, cover, and let sit another 24 hours.

If you didn’t see bubbles yesterday, just keep feeding. Consistency is key.

If you didn’t see bubbles yesterday, you might need to revive a dead starter; just keep feeding. Consistency is key.

Day 3 – Strengthening the Culture

By now you should notice more bubbles and a tangier aroma.

Feeding #2

Again discard half of the starter.
This time use 50 g all‑purpose flour and 50 g water.
Mix, cover, and wait 12 hours.

Why switch flour?

Whole‑wheat gives a boost early on, but all‑purpose keeps the starter flexible for different breads. On Sourdough Stories I’ve found this combo gives a lively starter without a harsh flavor.

Day 4 – The Starter Gets Active

Your starter should be doubling in size within 4‑6 hours after feeding. That’s the sweet spot.

Feeding #3

Discard down to 100 g total starter.
Add 50 g all‑purpose flour and 50 g water.
Stir, cover, and watch.

If it’s still sluggish, give it another 12‑hour cycle with the same feeding ratio. Warm spots in the kitchen (near the stove or on top of the fridge) can speed things up.

Day 5 – Ready to Bake

Congratulations! Your starter should be bubbly, have a pleasant sour smell, and rise predictably.

Final test

Spoon a teaspoon of starter into a glass of water. If it floats, it’s ready.
If it sinks, give it another feed and wait a few more hours.

Keeping it alive

Store the starter in the fridge if you bake weekly. Feed once a week: discard down to 100 g, add 50 g flour and 50 g water.
For daily bakers, keep it at room temperature and feed every 12 hours.

Quick Troubleshooting Cheat Sheet

Problem	Simple Fix
No bubbles after 48 h	Keep feeding, use whole‑wheat flour, ensure room is warm
Starter smells like nail polish	Discard more starter, feed with fresh flour and water
Too watery	Use a higher flour‑to‑water ratio (e.g., 1 : 0.8)
Overly sour	Feed more often, keep at cooler temperature

A Few Personal Tips from Sourdough Stories

Use the same water you’ll bake with. Chlorine can slow the microbes. Let tap water sit for a few hours or use filtered water.
Label your jar with the date you started. It’s easy to lose track after a few weeks.
Keep a small notebook (or a note on your phone) of each feeding. I jot down the time, temperature, and how the starter looked. It helps spot patterns.

Your First Bread

Now that your starter is strong, try a simple 100 % hydration starter loaf. Mix 200 g starter, 400 g bread flour, 300 g water, and 8 g salt. Autolyse for 30 minutes, then knead, bulk ferment 4 hours with a couple of folds, shape, proof 2 hours, and bake at 475 °F with steam for the first 20 minutes. The result? A crust that cracks like fresh pottery and a crumb that’s airy and tangy—exactly the kind of loaf I love sharing on Sourdough Stories.

Happy feeding, and may your kitchen be filled with the gentle hum of a thriving starter.