Fermented Vegetables · Beginner

Fermented Garlic: Lacto-Fermented Garlic Cloves in Brine

How to make fermented garlic: peeled cloves in a 3–5% salt brine for 3–4 weeks or longer. Salt amounts per jar, why garlic turns blue, safety, and how to use the cloves and the brine.

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Garlic cloves fermenting in brine beside a garlic bulb

Updated Oct 2026 · 1 min read

Fermented garlic is whole peeled cloves left in a salt brine until lactic acid bacteria turn the sharp, raw bite into something mellow, savoury and slightly sour. The cloves stay firm enough to slice, the brine becomes a ready-made seasoning, and the jar keeps for months in the fridge. It is a slow ferment, but almost entirely hands-off.

Fermented garlic recipe

3–5% brine strength (30–50 g salt per litre)
3–4 wk minimum ferment at 18–22°C
6+ mo fridge life once fermented
  1. 1
    Peel the garlic Separate and peel the cloves. Leave them whole; cut any very large cloves in half so they ferment evenly.
  2. 2
    Make the brine Dissolve 30–50 g of non-iodized salt per litre of filtered water. A pint jar of cloves needs about 250 ml of brine (8–12 g salt); a quart jar about 500 ml (15–25 g salt).
  3. 3
    Pack and cover Pack the cloves into a clean jar, pour the brine over to cover them by at least 2 cm, and add any extras: peppercorns, a bay leaf, chilli flakes or a sprig of thyme.
  4. 4
    Weigh them down Garlic floats. Use a fermentation weight or a small bag of brine so every clove stays below the surface.
  5. 5
    Ferment Keep the jar at 18–22°C with an airlock lid or a loose lid you open daily. The brine turns cloudy and slightly sour over the first two weeks.
  6. 6
    Refrigerate From 3–4 weeks, taste a clove. When the raw heat has softened to your liking, seal the jar and move it to the fridge.

What is normal, and what is not

Blue or green cloves A harmless reaction between garlic sulfur compounds and acid. Common with fresh garlic; safe to eat.
Cloudy brine A sign the lactic acid bacteria are working. A fine white sediment on the bottom is normal.
Slow bubbling Garlic ferments slowly. Small, occasional bubbles are all you will see for the first week or two.

Watch for

  • Fuzzy, coloured mould on the surface or any slimy, rotten smell Discard the batch.
  • A flat white film (kahm yeast) is harmless; skim it and make sure the cloves stay submerged.
  • Garlic that floats above the brine can spoil; keep it weighted down.
Salt weighed beside water, carrot sticks and a fermentation jar

Related calculator

Fermentation Brine Calculator

Calculate salt using vegetables plus water, water only, or dry vegetable weight. Match the percentage and basis in your tested recipe.

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Fermented garlic paste

For a spreadable version, blend peeled cloves into a coarse paste and mix in 2–3% salt by weight (2–3 g per 100 g of garlic) instead of covering them with brine. Pack it tightly into a small jar, press out air pockets, and ferment 1–2 weeks before refrigerating. It works like fresh minced garlic but with a rounder, slightly tangy flavour.

How to use fermented garlic

Whole cloves slice onto pizza, toss into pasta and stir-fries, or eat straight from the jar.
Mashed stir into butter, aioli, hummus and dressings for a mellow garlic flavour.
The brine use it as a seasoning in marinades and soups, or as a starter for your next vegetable ferment.

For why the method does not transfer to honey, see the garlic-honey safety review and flavor alternatives. Garlic also goes into fermented hot sauce, kimchi and most brined vegetables. The full list of vegetables you can ferment is in fermented vegetables A–Z.

FAQ

Frequently asked questions

How long does it take to ferment garlic?
About 3–4 weeks at 18–22°C before the cloves lose their raw bite. Many people leave it 2–3 months or more for softer, sweeter garlic. Move the jar to the fridge whenever the flavour suits you.
What brine strength should I use for garlic?
A 3–5% brine, which is 30–50 g of salt per litre of water. Garlic is firm and ferments slowly, so the stronger end protects it over a long ferment. Weigh the salt rather than measuring by the spoon.
Why did my fermented garlic turn blue?
Garlic contains sulfur compounds that react with the acid produced during fermentation to form blue and green pigments. It is harmless, does not change the flavour much, and is more common with young or fresh garlic.
Is fermented garlic safe?
Yes, when it is properly salted, kept under the brine, and the ferment becomes acidic. Lactic acid fermentation drops the pH below 4.6, which stops botulism. If the brine never turns cloudy or sour, or it smells rotten, throw it out.
Can I use the brine?
Yes. The garlicky brine is excellent in salad dressings, marinades and soups, or as a starter splash for your next vegetable ferment.
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