5 Mistakes to Avoid in Lacto-Fermentation (2024)

Before you start fermenting vegetables (lacto-fermentation), find out which little mistakes you can easily avoid!

Lacto-fermentation is not rocket science. Anyone can make fermented sauerkraut, kimchi, and pickles in their kitchen.

To ensure the success of all your fermented vegetable recipes, here are 5 mistakes to avoid!

1. Not Weighing Your Vegetables

Salt plays an essential role in vegetable fermentation. If there is not enough salt, fermentation can go wrong and there is a risk of mould. On the other hand, if there is too much salt, it tastes bad.

However, every vegetable is different. The weight of the vegetables is used to determine how much salt to add. Therefore, for every fermented vegetable recipe, we recommend weighing the vegetables to determine how much salt is needed. You don’t want to go by eye!

Solution: Weigh your vegetables.

For more information, see How Much Salt to Add in Lacto-Fermentation and Salt and Brine: A Complete Guide.

5 Mistakes to Avoid in Lacto-Fermentation (1)

2. Jarring Vegetables That Are Too Dry

When you put your vegetables in a jar, they must be submerged in liquid. This is what allows the fermentation to take place by preventing contact with air.

In recipes such as sauerkraut or kimchi, it is the salt that soaks the vegetables.

If the vegetables you are using are dry and do not create enough brine, simply add a little salted water to cover them properly (see Salt and Brine in Lacto-Fermentation: The Ultimate Guide).

When using brine, like for pickles, it’s really easy! Just add saltwater to cover the vegetables, and put a weight on them to keep them submerged.

Solution: In both cases, use a weight (glass weight, ViscoDisc, etc.) to prevent vegetables from being exposed to oxygen.

3. Opening the Jar During Fermentation

In lacto-fermentation, air is the enemy!

Although it is tempting, you should not open the jar during the fermentation of your vegetables.

If you do, you expose your vegetables to all sorts of moulds, yeast, and other microorganisms. Undesirable organisms could then develop on the surface of the vegetables.

The best thing to do is to leave the lid on and leave your jars alone.

When you open your jar, place it in the fridge for longer storage.

Solution: Only open the jar when you are ready to use it, then put it in the fridge.

4. Not Getting the Right Equipment

To avoid failure on your first attempt, make sure you have all the necessary equipment!

You can do it with what you have on hand, or you can buy specialized equipment. Whatever you use, you must have:

  • A container to put the vegetables in
  • A weight to keep the vegetables submerged
  • A way to get rid of the gas that is created during fermentation

Solution: Get the right equipment!

You’ll see, it’s really easy to do at home! For more information, see Choosing Your Lacto-Fermentation Equipment.

5. Not Daring to Take the Plunge

The most common mistake is to be afraid to take the plunge!

Fermenting vegetables is easy, fast, safe, economical, and delicious. If you know how to make a salad, you already know half the recipe!

By following some simple fundamentals, you can turn plain vegetables into tasty, lively condiments packed with goodness.

5 Mistakes to Avoid in Lacto-Fermentation (2)

Solution: Get started (and get trained if necessary)!

If you’re not sure where to start, check out our Guide to Fermenting Vegetables or try our 3 foolproof recipes.

Get Started!

5 Mistakes to Avoid in Lacto-Fermentation (2024)

FAQs

5 Mistakes to Avoid in Lacto-Fermentation? ›

Culture should not be backslopped. The absence of oxygen is required during fermentation. Preparer must cover product with liquid to exclude air during fermentation. Seal the fermentation vessel to exclude oxygen and ensure anaerobic conditions.

What should you not do during fermentation? ›

Culture should not be backslopped. The absence of oxygen is required during fermentation. Preparer must cover product with liquid to exclude air during fermentation. Seal the fermentation vessel to exclude oxygen and ensure anaerobic conditions.

What are the dangers of lacto-fermentation? ›

Lacto-fermentation is very safe.

Thanks to the acidic environment created by the good bacteria, no harmful bacteria can develop, as they cannot tolerate acidity.

What can go wrong when fermenting? ›

The anaerobic environment allows good bacteria (probiotics) to flourish and causes bad, potentially harmful bacteria to perish. The most common reason a batch of fermented vegetables goes wrong is that oxygen is present in the first few days of fermentation, the most critical period of the ferment.

What vegetables should not be fermented? ›

“There's no vegetable you can't ferment,” he said, but added that leafy greens such as kale — because of their chlorophyll content — aren't to most people's liking. During an NPR interview, Katz explained that pickling and fermentation are not the same, although they are “overlapping” categories.

What ruins fermentation? ›

However, after the fermentation has occurred, it's extremely important that we don't dip into those jars with our hands or unsterilized utensils. Anything you introduce into that ferment can actually take over and ruin it. Fermentation is truly a very simple form of preservation.

Can you open the lid during fermentation of vegetables? ›

Opening the Jar During Fermentation

Undesirable organisms could then develop on the surface of the vegetables. The best thing to do is to leave the lid on and leave your jars alone. When you open your jar, place it in the fridge for longer storage.

What percent brine for lacto-fermentation? ›

A 2% saltwater brine is typical for fermenting harder vegetables, such as cauliflower, radishes, carrots, beets, onions, and garlic. For softer vegetables (higher water content), such as cucumbers, bell peppers, and zucchini, a 5% saltwater brine is recommended.

Can botulism grow in brine? ›

For brines below 6% NaCl, which almost all fermentation brines are, the lactic acid bacteria have essentially no lag period and very quickly enter their exponential phase [1]. However, C. Botulinum can survive moderate amounts of salt as well, and if present, could also start multiplying.

Can you use too much salt when fermenting? ›

Salt in fermentation encourages the growth of healthy bacteria, while at the same time kills off bad bacteria. We need to be precise when measuring the salt and water, especially when fermenting vegetables that will be submerged in brine. Too much salt may kill off all the bacteria, thus preventing fermentation.

What are the rules for fermented food? ›

Fermented foods must have an equilibrium pH value below 4.6 and meet standards that destroy bacteria, yeast, and molds to a required level.

What are 3 disadvantages of fermentation? ›

Limitations of fermentation include:
  • Introduction of undesired microorganisms increases the risk of contamination, resulting in lower yields or impure products.
  • The need for specialized equipment and can increase the costs.
  • Energy-intensive operations and the need for stringent conditions increase energy consumption.
Feb 8, 2024

What does not occur during fermentation? ›

Fermentation does not involve an electron transport system, and no ATP is made by the fermentation process directly. Fermenters make very little ATP—only two ATP molecules per glucose molecule during glycolysis.

Can I open a jar during fermentation? ›

A TASTY RESULT TAKES PATIENCE. Be careful not to open your jar during the fermentation process!

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