The Truth About Coffee Grounds in Your Garden

Feb 24, 2012 by

by Michael Nolan on 16 February 2012

Image from myearthgarden.com

Even among garden authorities, there are commonly-held misconceptions about coffee grounds and their use in the garden, but their origins are easily understood.  Coffee is an acidic drink, so it makes sense that the coffee grounds would likewise be acidic.

Only it isn’t true.

In fact, coffee grounds are generally close to pH neutral (between 6.5 and 6.8).  As it turns out, the acid that is contained in coffee is water-soluble, so the acid is essentially washed out of the grounds when coffee is made, which is why you need an acid reducer but your coffee grounds don’t.

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