when to throw out sourdough starter — unhealthy sourdough starter in glass jar showing signs of contamination and inactivity

Is your sourdough starter dead, contaminated, or just struggling?

This guide helps you make that call with confidence — no more

guessing, no more throwing out a perfectly fixable starter, and

no more baking with one that should have been replaced weeks ago.

Find your specific situation below and get a clear answer.

More guides being added weekly.

--- CURRENT GUIDES ---

Is It Dead?

Coming soon — Is my sourdough starter dead or just dormant?

Coming soon — Sourdough starter smells fine but won't rise

Coming soon — How long does starter revival take?

Coming soon — Tried everything to revive starter — it still won't work

Mold and Contamination

Coming soon — Green mold on sourdough starter — toss or save?

Coming soon — Black mold on sourdough starter — what to do

Coming soon — Pink or orange streak in sourdough starter — safe?

Coming soon — White film on top of sourdough starter — what is it?

Coming soon — Signs your sourdough starter is contaminated

Neglected Starters

Coming soon — Sourdough starter left in fridge for months

Coming soon — Can you revive a starter neglected for 6 months?

Coming soon — Starter keeps dying after revival — break the cycle

Common Mistakes That Kill Starters

Coming soon — Did tap water kill my sourdough starter?

Coming soon — Did bleached flour ruin my starter?

Coming soon — Soap residue killed my sourdough starter — fix