Mix flour and water, feed on a schedule, and bake once the starter doubles fast and smells pleasantly tangy.
New to wild yeast? This guide walks you through a no-nonsense plan that builds a lively starter from scratch, keeps waste low, and gets you baking real bread on your own schedule. You’ll see what to do each day, what “healthy” looks like, and how to keep things steady once your jar is bubbling.
Day-By-Day Starter Timeline
Use a clean glass jar, a digital scale, and room-temperature water. Whole-grain flour wakes things up fast; all-purpose works too. Keep the jar loosely covered so gas can escape.
| Day | What You Do | Signs To Expect |
|---|---|---|
| 1 | Stir 50 g whole-grain flour with 50 g water. Rest. | Thick paste; a few tiny bubbles late in the day. |
| 2 | Add 50 g flour + 50 g water. No discard yet. | More bubbles, slight rise, mild fruity aroma. |
| 3 | Discard half; feed 1:1:1 (starter:water:flour). | Noticeable lift, light webbing on the surface. |
| 4 | Feed 1:2:2 every 12 hours. | Faster rise; soft dome on top after feeding. |
| 5 | Keep 1:2:2 or move to 1:5:5 if warm. | Peaks in 6–8 hours; sweet-tart smell. |
| 6 | Repeat twice daily feeds. | Starter doubles or triples between feeds. |
| 7–10 | Hold the same ratio; watch timing. | Reliable peak, spongy texture, clean tang. |
How Do I Start Sourdough? Step-By-Step Starter Plan
Gear And Setup
Grab a 1-pint jar, a silicone spatula, and a rubber band to mark the level after each feed. Aim for 70–78°F (21–26°C). Colder rooms slow things; warmer rooms speed it up.
Flour Choices That Build Strength
Whole-grain rye kicks off fast activity thanks to extra nutrients. A blend of 50% bread flour and 50% whole-grain (rye or wheat) gives balance: lift from white flour, vigor from whole-grain. Once stable, you can switch to all-purpose or bread flour for daily feeds.
Hydration, Ratios, And What They Mean
A 100% hydration starter uses equal parts water and flour by weight. Common daily feeds look like 1:1:1, 1:2:2, or 1:5:5. For a clear walkthrough, see King Arthur’s beginner guide. Higher ratios thin the acidity and extend peak time, which helps in warm kitchens. Lower ratios peak faster. Track how high the starter climbs in the jar and when it starts to fall; that rise-and-fall rhythm is your clock.
First Bake Readiness Check
Your starter is ready to bake when it doubles in 4–8 hours after a feed, smells pleasantly lactic with a hint of fruit, and drops a small spoonful that floats in cool water. The float test isn’t perfect, but paired with a strong rise and a rounded top, it’s a solid green light.
Starting Sourdough At Home: Feeding Schedule Options
Pick a plan that fits your life. Daily room-temp feeding gives speed. Refrigerated care trims effort. You can switch between them as seasons change.
Room-Temperature Care
Feed twice a day while the starter builds strength. A simple pattern is discard down to 20 g, then feed 20 g water and 20 g flour for 1:1:1, or keep 20 g starter and feed 40 g water + 40 g flour for 1:2:2. Watch for a consistent peak time across a few days; that’s stability.
Refrigerator Care
Once the culture is strong, stash it in the fridge and feed once a week. When you want to bake, give two room-temp feeds 12 hours apart to wake it up. Hold back a clean reserve jar so you have a backup.
Starter Hygiene And Safety
Work with clean tools, and don’t taste raw dough or raw discard. Flour is a raw ingredient, and it must be baked to be safe (FDA guidance). If you ever see bright pink, orange, fuzzy growth, or a harsh rotten smell, toss the lot and start fresh.
Common Problems And Quick Fixes
Slow Rise
Give it warmth, switch a portion of the flour to whole-grain, or increase the feed ratio. A small pinch of rye can jump-start lagging activity.
Too Sour, Too Fast
Feed a larger ratio like 1:5:5, use cooler water, and shorten the time at peak before baking. Thickening the starter with bread flour can also tame sharp notes.
Runny Or Separating
That gray layer (hooch) just means the culture burned through its food. Stir it in or pour it off, then feed. Keep a steadier rhythm next time.
Strong But Lacking Oven Spring
Build a separate levain that peaks right when you mix the dough. A young levain gives milder flavor and stronger lift; a mature one leans tangy.
When To Bake Your First Loaf
After the starter hits reliable peaks, you can bake. Many bakers see success between days 7 and 14. If your room is cool, it might take longer. The test that counts is behavior, not the calendar.
Flour, Water, And Salt Basics
Strong bread flour builds structure; whole-grain adds flavor and minerals; all-purpose makes flexible dough. Filtered or dechlorinated water keeps microbes happy. Regular table salt is fine; keep it out of the starter jar and add it to dough.
Starter To Levain: What Changes
The starter is your long-term culture. A levain is a portion you build for a bake with the timing and flour mix you want. This lets you keep the mother mild while tailoring flavor and strength for each loaf.
Simple First Loaf Formula
Once your jar passes the rise test, try this straightforward country loaf. Think of it as a template you can tweak later.
Ingredients
350 g bread flour, 150 g whole-wheat flour, 360 g water (room temp), 90 g ripe starter, 10 g fine salt.
Method At A Glance
1) Mix flour and water; rest 30 minutes. 2) Add starter and salt; mix until cohesive. 3) Bulk at 75°F for 3–4 hours with three gentle folds in the first 90 minutes. 4) Shape, then proof in a floured basket until the dough slowly springs back when pressed. 5) Bake at 475°F in a preheated Dutch oven: 20 minutes covered, 20–25 minutes uncovered until deep brown. 6) Cool fully before slicing.
Timing Cues
If the dough races, drop the room a couple of degrees or shorten bulk. If it lags, give it a warm spot or a bit more time between folds. A smooth surface, small bubbles at the edge, and light jiggle point to ready-to-shape dough.
Hydration Cheat Sheet And Flour Swaps
| Feed Style | What It Does | Good For |
|---|---|---|
| 100% Hydration | Even parts water and flour; fast rise. | Daily care, easy tracking. |
| Stiffer 60–70% | Thicker paste; slower acid build. | Warm rooms; less sour. |
| Rye Blend | High nutrient; jump-starts activity. | New builds; revives. |
| All-Purpose Only | Gentle flavor; softer dough. | Sandwich loaves, focaccia. |
| Bread Flour | Extra strength in gluten network. | Open crumb boules. |
| Whole-Wheat | Nutty notes; faster ferment. | Hearty loaves, blends. |
| Cold-Water Feeds | Slows the clock. | Hot seasons; long gaps. |
Minimal-Waste Tips
Keep a small starter (20–30 g) between bakes. Build only what you need for levain. Turn extra into pancakes, crackers, or batter once cooked.
Exact Steps You Can Follow Tonight
Day 1, Evening
In a jar, mix 30 g whole-grain rye with 30 g water. Scrape down the sides. Cover loosely.
Day 2, Evening
Add 30 g bread flour and 30 g water. Stir well.
Day 3, Morning And Night
Discard down to 30 g. Feed 30 g water + 30 g flour each time. Mark the level.
Day 4
Feed 1:2:2 twice. If your room is hot, go 1:5:5 in the morning. Watch the dome and the rise line.
Day 5
If it doubles in under 8 hours and smells clean and fruity, build a levain for a bake. If not, keep feeding; you’re almost there.
Real-World Checks For Your Starter
Say you’re asking, “how do i start sourdough?” Here’s the quick scan: does it rise high after a feed, fall on a schedule, and smell bright? If yes, you’re ready. If no, warm it up, feed a bigger ratio, and boost whole-grain for a day or two.
Storage, Travel, And Backups
Keep a dry portion on parchment as a safety net: spread a thin layer of active starter, air-dry, then bag and label. To revive, soak flakes in warm water and feed twice a day.
Shipping your culture? Smear a thin line inside a small zip bag, seal, and mail as dried flakes. For flights, pack the dry backup; liquids may draw scrutiny at security.
Quick Answers For Common Questions
Do I Have To Discard?
During the build, yes, because you’re setting the feed ratio and keeping the jar size sane. Once mature, scale the culture down and feed only what you use, so discard drops to near zero.
What If My Tap Water Has Chlorine?
Let it sit out in an open cup for a few hours, or use filtered water. Many home bakers do fine either way.
Can I Bake On Day 3?
Not yet. Yeast and lactic acid bacteria need a few days to balance. You can cook the discard in pancakes or waffles once heat is involved.
One last pass for the exact phrase again: “how do i start sourdough?” Start with flour and water, feed on a rhythm, watch the peaks, and bake when it doubles fast.
