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It also impacts the health of the SCOBY. Brewing kombucha at too cold a temperature results in weak SCOBY growth, and weak flavor. It also makes your SCOBY susceptible to mold – your worst kombucha brewing enemy.
You will likely discover that there is a certain sweet spot in the brewing process at which time the kombucha is exactly to your liking – slightly tart, with a hint of sweetness. To find this sweet spot each time you brew requires that the fermentation process occurs at a consistent temperature.
See our 2019 update below
We have recently discovered an easier way to keep our brew at the perfect brewing temperature during the cold months. The manufacturers of seedling mats now sell thermostats that work well to keep the temperature perfectly in the correct range. The thermostat plugs into the power outlet and the heating mat plugs into the thermostat.
A temperature sensor probe is included that is affixed to the outside of the brewing jar. It senses the temperature of the jar and controls how much heat the heating mat puts out.
You can purchase the thermostats separately or purchase the heating mat with an included thermostat. Here are our picks for the top rated thermostats.
Purchase a thermostat-heating mat combo and have your kombucha brewing at the perfect temperature with almost no effort!