Fermented Foods Guide

By GreenHabit Team • 12 min read • January 3, 2026

Fermentation is humanity's oldest food preservation technique. It's also incredibly easy—just salt, vegetables, time, and the magic of beneficial bacteria.

Why Ferment?

Homemade sauerkraut in jars

How Lacto-Fermentation Works

Salt creates an environment where only beneficial lactobacillus bacteria can thrive. These bacteria eat sugars and produce lactic acid, which:

🧂 Salt Ratio

The magic number: 2% salt by weight. For 1 pound (454g) of vegetables, use about 9 grams (1.5 teaspoons) of salt. Too little and food spoils; too much inhibits fermentation.

Basic Equipment

🥬 Basic Sauerkraut

Ingredients:

  • 1 medium cabbage (about 2 lbs)
  • 1 tablespoon sea salt

Instructions:

  1. Remove outer leaves, quarter and core cabbage
  2. Slice thinly and place in large bowl
  3. Add salt and massage 5-10 minutes until juicy
  4. Pack tightly into jar, pressing down
  5. Liquid should cover cabbage
  6. Weight down and cover loosely
  7. Ferment at room temp 1-4 weeks
  8. Taste periodically—refrigerate when you like it!
Making homemade kimchi

🌶️ Simple Kimchi

Ingredients:

  • 1 napa cabbage
  • 1/4 cup sea salt
  • 1 tablespoon grated ginger
  • 4 cloves garlic, minced
  • 2-3 tablespoons Korean chili flakes (gochugaru)
  • 4 scallions, chopped
  • 1 tablespoon fish sauce (or soy sauce)

Instructions:

  1. Quarter cabbage and salt between layers, let sit 2 hours
  2. Rinse well and squeeze dry
  3. Mix ginger, garlic, chili, fish sauce into paste
  4. Massage paste into cabbage, add scallions
  5. Pack into jar, pressing out air
  6. Ferment 3-5 days at room temperature
  7. Refrigerate—flavor develops over weeks

Easy Vegetables to Ferment

Troubleshooting

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