Why Did My Sourdough Starter Rise on Day 3 Then Stop?
A beginner-friendly guide to the early stages of fermentation.
What's a "false rise"?
In the first 2–3 days, certain bacteria produce gas quickly, making the mixture puff up. This looks like success, but it's temporary. As the starter ecosystem shifts, that gas production drops—so the rise disappears. This is normal.
The bacterial bloom
Early on, bacteria outnumber yeasts. You may see bubbles and smell sweet or fruity notes, then activity slows. Don't worry—the yeasts are still building their numbers.
Normal fermentation stages
Stage 1 (Days 1–3): Wake-up and bacterial gas.
Stage 2 (Days 3–6): Quiet period while acid-loving yeasts establish.
Stage 3 (Days 5–7+): Consistent bubbles, pleasant tang, and predictable rise after feedings.
What to expect next
A lull in activity after Day 3 is expected. Keep the starter warm (around 75°F), feed on schedule, and watch for steady, smaller bubbles returning within a few days.
When to keep feeding
• If there's no foul odor (just tangy or slightly sour)
• If you see any bubbles at all
• If it rises some within 4–8 hours after feeding by Days 5–7
When to start over
• Visible mold (pink, orange, or fuzzy green/black)
• Strong rotten or chemical smell
• Starter hasn't shown any bubbles or aroma change after 7–10 days despite warm temps and consistent feedings
Quick tips
• Use non-chlorinated water if tap is heavily chlorinated.
• Keep it warm and consistent (avoid big temperature swings).
• Stir well at each feed to distribute yeast and oxygen.
• Be patient—reliable rise often appears around Days 5–7.
Next: See our Activation Guide for step-by-step feeding and readiness checks.
Keep going: View the Activation Guide for step-by-step instructions, then join 400+ bakers in the Blue Ridge Sourdough Community for recipes, troubleshooting, and support.
