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Fermentation
Making foods like sauerkraut, kimchi, kombucha and sourdough using microbes.
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Startup cost
Under $25
Difficulty
Some practice needed
Typical session
~30 min
Activity
Sitting / gentle
Space
A table or desk
Equipment
A basic kit
What do you actually do?
- Salt vegetables into kraut or kimchi
- Brew kombucha or water kefir
- Maintain a sourdough starter
Why people enjoy it
- Living science in a jar
- Cheap ingredients
- Bold flavors
What you'll need
- Glass jars
- Salt
- Vegetables
- Weights to keep veg submerged
Startup cost: Under $25 — a rough beginner estimate in US dollars (2026). Borrowing, secondhand and library kits can bring it down.
Time & difficulty
A typical session is about 30 minutes. Some practice needed: first tries are wobbly, but a few sessions make a real difference.
Getting started
- Make a basic sauerkraut with cabbage and salt
- Keep vegetables under the brine
- Taste daily after a few days
- Refrigerate when you like the flavor
Common beginner mistakes
- Vegetables above the brine, which invites mold
- Guessing salt amounts
- Sealing jars too tight with active ferments
Accessibility
Light prep; follow tested recipes for food safety.
Courses & resources
We haven't verified specific courses yet, so we're not listing any rather than guessing. Libraries, community centers and the official sites of tools you use are good first stops.