Old-school gardeners like me often brewed up a sort of compost tea by dumping a heap of whatever compost they had in a bucket of water and then sloshing it about where it seemed it might be needed. These days, commercial compost teas are made with carefully curated, standardized ingredients. The teas are then aerated by churning to “awaken” dormant microorganisms that should promote plant health. The result is often used as a foliar spray, which should work more quickly than root applications.
Fermentation is the bacterial and fungal process of decomposing sugars that gives us wine, beer, cheese, salame, pickles, kimchi, and so much more. Recently I made a post about making homemade ginger beer, a process that uses wild bacteria to ferment ginger brew. (The bible for kitchen fermentation is Sandor Katz’s The Art of Fermentation.) Today I would like to talk about using fermentation to safely convert the valuable nutrients in kitchen waste into effective fertilizer for the garden.