Best Time of Year to Start Fermentation?

Ideal Temperature Range

For optimal lacto fermentation, a temperature range of 64°F to 75°F (18°C to 24°C) is ideal. This allows the natural bacteria on the vegetables to produce lactic acid, preserving the food and creating the desired flavor. Avoid temperatures above 80°F (27°C) as they can lead to unwanted bacterial growth.

Starting in Autumn

Autumn is an excellent time to start lacto fermentation. The air is generally cooler, and the humidity is lower, making it easier to maintain the ideal temperature range. Additionally, the vegetables harvested during this season, such as cabbage, carrots, and beets, are often sweeter and more flavorful, making them perfect for lacto fermentation. Start by preparing a simple brine solution (1-2% salt) and packing the vegetables into a jar, leaving about 1 inch (2.5 cm) of space at the top. Weigh down the vegetables with a fermentation weight or a plate, and cover the jar with a cloth or paper towel to keep dust out.

Monitoring Temperature and Progress

To ensure the fermentation process occurs within the ideal temperature range, monitor the temperature daily and adjust the environment as needed. Check the fermentation progress by tasting the vegetables after 3-5 days and then every day or two after that. The fermentation is complete when the vegetables are sour, slightly effervescent, and have a tangy flavor. Once the fermentation is complete, store the vegetables in the refrigerator to slow down the fermentation process.