"Second ferment" refers to a process where a food or drink undergoes a second stage of fermentation to enhance its flavor, texture, or beneficial properties. Full definition
We use them for storage, drinking glasses, fermenting things like beet kvass or water kefir, and salsa, as well as for second ferments of kombucha. (wellnessmama.com)
The ginger goes with just about everything The berries and hibiscus offer great flavor and lovely color It all fizzes in second ferment beautifully (store.kombuchakamp.com)
I just made these with kombucha I had second fermented with berries. (mommypotamus.com)