Method: Submerged-Brine Lacto Vegetables

Why this method

Submerging vegetables in a measured equilibrium brine is the most controllable way to lacto-ferment anything you don’t shred. You add water, so you can size the salt against the whole jar and know exactly where it lands — unlike dry-salting, where the released brine volume is a guess. The brine also enforces the one non-negotiable rule of vegetable fermentation: everything stays under the liquid, where it’s anaerobic. Exposed vegetable molds; submerged vegetable sours. This single method, swapping the 2.0%, 3.0%, or 5%+ brine, covers most pickles you’ll make.

Parameters

Parameter	Value
Salt % (EQ, by weight)	2–3% of vegetable + water (2.0% cool/short, 3.0% warm/long)
Fermentation temp	18–22 °C / 64–72 °F
Duration	5–14 days (longer at higher salt or cooler temps)
Target finished pH	3.4–4.0
Vessel	Wide-mouth jar or crock with a weight and loose lid or airlock
Cold arrest	2–4 °C refrigerator once at target

Equipment

Gram scale (0.1 g resolution for small batches)
Wide-mouth jar or fermentation crock
Fermentation weight (glass, ceramic, or a brine-filled bag) to hold vegetables down
Loose lid, cloth-and-band, or airlock
Calibrated pH meter (taste is not a safety test)
Non-iodized salt (pickling, kosher, or fine sea)

Workflow

Pack and weigh the base

Pack clean, cut vegetables into the jar with any garlic, dill, or spice. Fill with water to ~2 cm headspace, then pour that water into a tared bowl. Record vegetable weight + water weight as your base — e.g. 400 g veg + 600 g water = 1000 g.

Calculate the equilibrium salt

Pick your brine: 2.0% for cool rooms and quick pickles, 3.0% for warm rooms or long ferments. Multiply the base by the target — 1000 g × 2.5% = 25 g. The brine salinity calculator does the exact math and corrects for salt purity; the fermentation predictor estimates the timeline.

Dissolve and pour

Stir the salt into the measured water until fully dissolved, then pour the brine back over the packed vegetables. Everything should be submerged.

Weight it under the brine

Set a fermentation weight on top so nothing floats, leaving ~2 cm headspace. This is the most important step: any vegetable above the brine line will mold.

Ferment at 18–22 °C and burp

Cover loosely or fit an airlock and hold at 18–22 °C, out of direct sun. If the lid is sealed, burp daily to release CO₂ — pressure builds fast in the first 3–5 days.

Finish by pH, then chill

Start tasting at day 3. When sour and still crunchy — usually 5–14 days — confirm pH 3.4–4.0 with a calibrated meter, then move to the refrigerator (2–4 °C), which effectively arrests the ferment.