When it goes wrong · Ferment
Soft, mushy vegetables.
Can you save it?
Reviewed for this symptom
If it smells sharply sour and clean, it is safe — use it in cooked dishes, a soup or a purée where texture does not matter. The crunch will not come back.
Safety boundary: Soft plus any off, putrid or cheesy smell is spoilage, not fermentation; discard it.
How to confirm the diagnosis
Observable cues, not inferred user state
- Soft, slippery vegetables
- It smells clean and sour
- The room was warm, or the salt was light
Not this?
What actually happened
Only this symptom
Too little salt, too warm, or the vegetable was not fresh. Pectin-degrading enzymes have run ahead of the acidification.
The full mechanism
Shared by every ferment failure
Fermentation is controlled spoilage, and the control comes from making conditions that one organism tolerates and others do not. In vegetables, salt at roughly 2% by weight is enough to inhibit most spoilage bacteria while lactic acid bacteria — already present on the vegetable — carry on. They convert sugars to lactic acid, the pH falls, and below about 4.6 almost nothing dangerous can grow, so the ferment protects itself as it proceeds. Submersion matters for the same reason: the useful bacteria work without oxygen, and the moulds and yeasts that spoil a crock work only with it, so anything above the brine line is at risk while everything below is safe. In dairy, the same acidification makes casein clump, which is the thickening in yogurt and crema. In bread, wild yeast and lactobacilli produce gas and acid together.
The full Ferment lesson — how to tell, where to practise it, what it carries to.
Next time
Prevent this specific failure
Two percent salt by weight, the freshest vegetables, a cool room, and tannin — a grape or oak leaf, or a tea bag — in the jar.
What right looks like
Shared by every ferment failure
- Bubbles appear within a day or two and the brine turns cloudy — both are signs it is working, not spoiling.
- The smell is sharply sour and clean. Anything yeasty, cheesy or putrid is a different organism.
- Vegetables lose their bright colour and go translucent as the acid works into them.
- Taste is the real gauge, and it should be sour enough to make you flinch slightly before it is done.