If you’ve ever tried making your own sauerkraut, kimchi, pickles, or fermented veggies, you know that one rule reigns supreme: keep it submerged. That’s where fermentation weights come in. These humble, often overlooked tools make a big difference between a crisp, tangy batch of fermented goodness and a moldy, mushy mess.
Whether you’re a seasoned fermenter or just getting started, fermentation weights are key to maintaining a safe, effective, and stress-free fermenting process.
What Are Fermentation Weights?
Fermentation weights are small, food-safe weights—typically made of glass, ceramic, or stainless steel—that are used to keep vegetables and other fermenting ingredients fully submerged under the brine during the fermentation process.
They are usually sized to fit inside wide-mouth jars or fermentation crocks, resting directly on top of the food to prevent it from floating up and coming into contact with air.
Benefits of Using Fermentation Weights
Mold Prevention
By keeping veggies submerged under brine, fermentation weights help prevent exposure to oxygen—reducing the risk of mold, yeast, or spoilage.
Consistent Results
Even pressure means even fermentation, so you get more consistent flavor, texture, and tang.
Hygienic & Food-Safe
Reusable fermentation weights are made from non-reactive materials that won’t leach into your ferment or affect taste.
Set It and Forget It
Once in place, they let you walk away with peace of mind—no need to constantly push down your veggies or check for floaters.
Best Foods to Use with Fermentation Weights
- Sauerkraut
- Kimchi
- Pickles
- Carrots
- Beets
- Garlic cloves
- Fermented slaws
Basically, anything you’re submerging in brine for lacto-fermentation will benefit from weights.
Types of Fermentation Weights
- Glass Weights
Transparent, easy to sterilize, and won’t absorb odors or flavors. - Ceramic Weights
Traditional and often used in crocks—make sure they’re lead-free and food-safe. - Stainless Steel Weights
Sleek, durable, and heavy enough to keep things down. Great for modern kitchens. - DIY Options
Ziplock bags filled with brine, small dishes, or even sterilized rocks—but these aren’t always as clean or reliable as dedicated weights.
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