Salt Questions · Cooking & kitchen
What is the best salt for fermenting vegetables?
Short answer
Use pure salt without iodine or anti-caking agents: pickling or canning salt, additive-free kosher salt, or pure sea salt. Weigh it. Sauerkraut is typically made with about 2–2.5% salt by weight of cabbage, around 3 tablespoons of pickling salt per 5 pounds (2.3 kg).
Why pure salt
University food-preservation guides recommend canning or pickling salt for ferments and pickles. Anti-caking agents can cloud the brine, and iodine may darken or discolour vegetables. Fermentation still works with iodized salt, but pure salt gives clearer, better-looking results.
How much salt
- Sauerkraut: about 2–2.5% of the cabbage's weight.
- Brined vegetables (cucumbers, carrots): brine strengths of about 3–5% are common.
Salt keeps spoilage organisms in check while lactic acid bacteria, which tolerate salt, turn sugars into acid. Too little salt risks soft, spoiled vegetables; too much slows fermentation.
Measure by weight
Crystal size changes how much salt fits in a spoon, so a kitchen scale is the most reliable way to hit the right percentage. Our brine calculator can do the maths.
Related on The Salt Almanac
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- Can you use iodized salt for canning and pickling?
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- How much kosher salt equals one teaspoon of table salt?
- Why do you put salt on a steak before grilling?
- What does finishing salt mean in cooking?
Cite this page
For school projects and reports. Teachers often prefer the original sources too: see the list below.
The Salt Almanac. (2026, November 8). What is the best salt for fermenting vegetables. https://saltalmanac.com/answers/what-is-the-best-salt-for-fermenting-vegetables
“What is the best salt for fermenting vegetables.” The Salt Almanac, 8 Nov. 2026, saltalmanac.com/answers/what-is-the-best-salt-for-fermenting-vegetables. Accessed [today's date].
“What is the best salt for fermenting vegetables.” The Salt Almanac. Last modified November 8, 2026. https://saltalmanac.com/answers/what-is-the-best-salt-for-fermenting-vegetables.
Original sources
- Penn State Extension. Salt in canning. https://extension.psu.edu/salt-in-canning
- Nebraska Extension. Ingredients for pickles. https://food.unl.edu/ingredients-pickles/
- Wikipedia. Sauerkraut. https://en.wikipedia.org/wiki/Sauerkraut