Kimchi

Kimchi is a Korean salted-vegetable ferment. UGA Extension’s 2025 circular describes the typical baechu style as Napa cabbage (also called Chinese or winter cabbage) mixed with carrots, onions, green onions, radish, Ginger, Garlic, fish sauce, and Gochugaru — Korean red chili pepper powder ¹. Sauerkraut is headed cabbage in its own salt brine. Same LAB family, different cabbage, seasoning, and clock. Do not copy NCHFP kraut weeks onto this jar.

This is Lacto-fermentation, not a vinegar pickle and not a boiling-water canning process. NCHFP’s general fermenting page is about kraut and brined pickles; use it for the idea that salt in fermented cabbage is not optional, not as a kimchi recipe ².

UGA: lactic acid bacteria grow in the salty, low-oxygen jar. Early on they break down sugars in the cabbage and make acid and gas — the sour taste and the bubbles. Salt at the concentration in a tested recipe helps keep unwanted bacteria down until the good ones take over; time lets pH fall ¹. That is selection, not a chili marinade.

Salt, time, and cold #

UGA: after cleaning, rub cabbage with salt and rest, massaging every 30 minutes for 2 hours, so juice becomes brine. Pack tightly, loosely cover, room temperature for the first 48 hours, then move to the refrigerator. Keep storage at 41 °F or below. Bubbling may show in the first 1 to 2 days at room temperature. By days 5 to 7 the flavor is tangier and the texture softer. After about two weeks, they describe pH below 4.6, acidic enough to inhibit most foodborne pathogens ¹. Those are that circular’s stages, not a clock you invent.

Sanitize knives, boards, bowls, and jars: wash, then submerge in hot water at least 160 °F for at least 30 seconds ¹. Wash hands 20 seconds. Wash vegetables under running water.

What to notice — and when to throw it out #

Bubbles, a clean sour-chili smell, cabbage that softens but does not slime. Mold, an odor that is not the usual fermented aroma, or an unusual texture: discard. UGA treats spoilage as a safety risk, not a quality footnote ¹.

Fish sauce, shrimp paste, or anchovy can be fish or shellfish allergens; sesame oil in some versions is sesame. Read the bowl. Food safety does not invent a rescue.

Acidity is why pH 4.6 matters. Canning time for kimchi must come from a tested process for that product.