fermenting • Crop: Cabbage

9 min read • Updated: August 2026

How to Make Sauerkraut: Dry-Salting Cabbage Step-by-Step

Shredded garden cabbage dry-salted with NCHFP-recommended proportions (3 tablespoons canning salt per 5 pounds cabbage, or approx. 2.25% by weight) releases its own natural juices to create an anaerobic lactic fermentation environment. No water, vinegar, or starter culture needed.

Mandatory Salinity Ratio

3 tbsp canning salt per 5 lbs cabbage (approx. 2.25% by weight)

NCHFP and the USDA Complete Guide to Home Canning publish sauerkraut salting as an exact quantity: 3 tablespoons of pure canning or pickling salt per 5 pounds of shredded cabbage (or 3/4 cup per 25 pounds). Converted by weight, 3 level tablespoons of canning salt (~51g to 54g) on 5 pounds of cabbage (2,268g) yields approximately 2.25% to 2.38% salinity; that percentage conversion figure is ours, not an authority's. For preservers measuring with a digital scale, University of California Agriculture and Natural Resources (UC ANR Publication 8051) also explicitly publishes a guideline of 2.25% to 2.5% salt by cabbage weight to favor Leuconostoc mesenteroides and drop pH below 4.0.

Your Harvest Batch Weight (g):

Exact Pure Salt Required: 22.5 grams Conversion: approx. 22.5g/kg (2.25%). That percentage conversion is ours; NCHFP publishes 3 tbsp / 5 lbs.

Key Scientific Takeaways

• Follow NCHFP's published ratio: 3 tablespoons of pure canning salt per 5 pounds of shredded cabbage. Converted to weight, this is approximately 22.5g to 24g salt per 1,000g cabbage (~2.25%); that percentage conversion figure is ours, not an authority's (UC ANR Publication 8051 publishes 2.25% to 2.5% by weight).
• Discard outer dirty cabbage leaves, but do not wash trimmed leaves with chlorinated tap water if possible.
• Massage shredded cabbage firmly for 8–12 minutes until ample natural brine pools in the bowl.
• Pack cabbage tightly into a glass jar or ceramic crock, ensuring all cabbage remains 1 inch below the liquid line.
• Ferment at 68°F–72°F (20°C–22°C) for 3 to 4 weeks for optimal lactic acid development and crispness.
• Always transfer finished sauerkraut to refrigerator storage at 34°F–39°F; live ferments require cold refrigeration.

Required Supplies & Ingredients

Item	Quantity / Specification	Technical Notes
Fresh Green or Red Cabbage	5 lbs (2.27 kg) trimmed	Dense, freshly harvested heads yield the crispest texture and highest natural moisture.
Pure Canning & Pickling Salt	3 tbsp per 5 lbs cabbage (~51g–54g / approx. 2.25% by weight)	NCHFP publishes 3 tablespoons per 5 pounds of cabbage. The weight conversion of ~51g–54g (~2.25%) is ours, not an authority's. Never use iodized table salt with anti-caking silicates.
1-Gallon Glass Jar or Ceramic Fermentation Crock	1 container (food-grade)	Must be sanitized and non-reactive (glass, stoneware, or food-grade HDPE plastic).
Glass Fermentation Weight	1–2 heavy glass discs	Submerges cabbage under the brine to prevent exposure to airborne mold.
Airlock Lid or Fermentation Cap	1 unit	Allows carbon dioxide to escape automatically while preventing oxygen and fruit flies from entering.

Step-by-Step Procedure

Interactive Kitchen Checklist

Step 1

Clean, Core, and Weigh the Cabbage

Remove and discard the limp outer leaves of the cabbage heads. Reserve 1–2 large, clean, undamaged outer leaves for later use as a surface cap. Cut each head into quarters and remove the hard inner core. Weigh the trimmed cabbage quarters. NCHFP specifies 3 tablespoons of canning salt per 5 pounds of cabbage (2,268g). If using a digital scale by weight, 3 tbsp per 5 lbs converts to approximately 2.25% by weight (22.5g salt per 1,000g cabbage); that percentage conversion figure is ours, not NCHFP's, though UC ANR Publication 8051 publishes 2.25%–2.5% by weight.

Pro Tip: For a 5 lb batch, measure exactly 3 level tablespoons of pure canning salt.

Step 2

Shred Cabbage Uniformly

Using a sharp chef knife, mandoline slicer, or food processor, shred the cabbage finely into ribbons approximately 1/16 to 1/8 inch (1.5mm to 3mm) thick. Uniform shredding ensures even salt absorption and consistent texture throughout the crock.

Critical Safety: Always use the safety hand guard when operating a mandoline slicer.

Step 3

Apply Salt and Massage for Natural Brine

Place shredded cabbage into a large food-grade bowl in batches, sprinkling each batch with its proportional share of canning salt (3 tablespoons total per 5 pounds of cabbage). Toss thoroughly, then massage and squeeze the cabbage firmly with clean hands for 8 to 12 minutes. The salt will draw cell water through osmosis, creating a copious pool of clear, aromatic cabbage brine.

Pro Tip: If your hands get tired, let the salted cabbage rest for 15 minutes. Osmosis will do half the work, making it easy to finish massaging.

Step 4

Pack Tightly into the Fermentation Vessel

Transfer the cabbage into your sanitized jar or crock one handful at a time. Tamp down firmly with a clean wooden tamper, cabbage crusher, or your fist after each addition to eliminate all air pockets. Pour all remaining brine from the mixing bowl into the container. The liquid should rise at least 1 to 2 inches above the packed cabbage.

Critical Safety: If cabbage is dry and natural brine does not rise above the packed cabbage by 1 inch, NCHFP specifies preparing a supplementary brine of 1-1/2 tablespoons canning salt per 1 quart of boiled, cooled water.

Step 5

Apply the Leaf Cap and Glass Weight

Place the reserved whole cabbage leaf flat over the shredded cabbage surface, tucking the edges down around the sides. Place a heavy, sanitized glass fermentation weight directly on top of the leaf. Press down until brine submerges the weight completely. Fasten the airlock lid onto the jar.

Pro Tip: The whole leaf acts as a barrier, preventing stray shreds of cabbage (floaters) from escaping past the weight and touching the air.

Step 6

Ferment at 68°F–72°F (20°C–22°C)

Place the fermentation vessel in a cool, dark location away from direct sunlight. Maintain ambient temperature between 68°F and 72°F. Bubbling (carbon dioxide release) typically begins within 24 to 48 hours as Leuconostoc mesenteroides bacteria initiate the first phase of fermentation, followed by Lactobacillus plantarum.

Critical Safety: Temperatures below 60°F will slow fermentation significantly; temperatures above 75°F cause rapid, soft, or discolored kraut.

Step 7

Monitor and Taste Test (Weeks 2 through 4)

Check the jar periodically to ensure the cabbage remains submerged beneath the brine. At 3 weeks, sample a small forkful of kraut with a clean utensil. When it reaches your preferred level of tartness and crisp crunch (pH between 3.5 and 3.8), fermentation is complete.

Pro Tip: Sauerkraut fermented at 70°F reaches peak quality in 3 to 4 weeks.

Step 8

Transfer to Cold Storage

Remove the glass weight and top cabbage leaf. Wipe the jar rim clean, seal with a standard airtight lid, and place the jar in the refrigerator (below 40°F / 4.4°C). Cold temperatures virtually halt microbial activity while preserving crisp texture and tangy flavor for 6 to 12 months.

Critical Safety: Home-fermented sauerkraut is a live-culture food and must be kept in cold refrigerator storage.

The Three-Stage Microbiology of Lactic Fermentation

According to research from the National Center for Home Food Preservation and university food science departments, true sauerkraut fermentation relies on an orderly succession of bacterial species:

Stage 1 (Days 1–3): Leuconostoc mesenteroides — A gas-producing coccus that thrives at 65°F–70°F in 2.25% salinity. It rapidly produces lactic acid, acetic acid, and CO2, driving the pH down quickly to inhibit potential spoilage organisms.
Stage 2 (Days 4–10): Lactobacillus plantarum and L. brevis — As acidity increases, these acid-tolerant rod bacteria take over, converting remaining sugars into high concentrations of lactic acid.
Stage 3 (Days 11–28): Pediococcus cerevisiae & Lactobacillus pentoaceticus — These finish the fermentation, bringing final total acidity to approximately 1.5%–2.0% (as lactic acid) and giving sauerkraut its characteristic sharp, clean flavor.

Common Sauerkraut Quality Indicators

Observation	Probable Cause	Action Required
Cloudy Brine & Tiny Bubbles	Active lactic acid bacteria & CO2 release	Normal and desirable. Leave alone.
Thin White Film on Brine Surface	Kahm yeast (aerobic film yeast due to oxygen exposure)	Skim off immediately. Re-submerge cabbage under weight. Non-toxic but can affect flavor if left.
Pink or Reddish Discoloration	Growth of Rhodotorula yeast due to uneven salting or high temperatures (above 75°F)	Discard batch completely. Do not eat.
Soft, Mushy, or Slimy Cabbage	Insufficient salt (under 2.0%), high fermentation temp, or air exposure	Discard batch completely.

Frequently Asked Questions

Why do I need to use pure canning and pickling salt? ▼

Table salt contains anti-caking agents (like calcium silicate or sodium ferrocyanide) that cause cloudiness and sediment in your brine, and potassium iodide which can impart a bitter medicinal taste and inhibit beneficial lactic acid bacteria. Pure canning and pickling salt is 100% pure sodium chloride.

Can I add water to my sauerkraut if the cabbage does not produce enough brine? ▼

Fresh cabbage almost always yields enough brine when weighed and massaged properly. However, if your cabbage was stored for months and lacks moisture, do not add plain tap water (which dilutes the salinity). Instead, dissolve 25 grams of canning salt in 1,000 ml of boiled and cooled water (a 2.5% salinity brine) and pour over the cabbage until submerged.

Is homemade sauerkraut safe from botulism? ▼

Yes, when made following proper salt ratios (2.25%–2.5%). The combination of salt, rapid carbon dioxide generation, and lactic acid production quickly reduces the pH of the ferment to below 4.0 within 48 to 72 hours. Clostridium botulinum cannot produce toxin at a pH below 4.6.

Can I can or water-bath my sauerkraut for long-term shelf storage? ▼

While heat processing exists in historic literature, heating destroys all beneficial probiotic cultures and degrades the crisp crunch of raw kraut. Storing raw sauerkraut in your refrigerator (under 40°F) safely preserves quality for 6 to 12 months with live active cultures.

Scientific Citations & University Extension Bibliography

Every parameter, salinity threshold, temperature range, and step in this guide is derived directly from the following authoritative publications:

National Center for Home Food Preservation (NCHFP)

University of Georgia Extension

"How Do I... Ferment? Making Fermented Sauerkraut (Procedure & Ratios)"

Ref: FDNS-E-43-1
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USDA Complete Guide to Home Canning

United States Department of Agriculture (USDA-NIFA)

"Guide 6: Preparing and Canning Fermented Food and Pickled Vegetables (pp. 6-7)"

Ref: Agriculture Information Bulletin No. 539
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University of California Agriculture and Natural Resources (UC ANR)

University of California Cooperative Extension

"Cabbage: Safe Methods to Store, Preserve, and Enjoy (2.25%–2.5% Salinity Standard)"

Ref: UC ANR Publication 8051
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Penn State Extension

The Pennsylvania State University

"Cabbage Fermentation: Dry Salting Standards and Microorganism Progression"
Access Official Publication Source ↗
University of Wisconsin-Madison Division of Extension

Wisconsin Food Safety Program

"Safe Production of Fermented Vegetables and Sauerkraut"
Access Official Publication Source ↗

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