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Appreciation post: My grandma's tomato planting trick changed how I garden
She used old coffee grounds for planting. Now I see natural ways are just as good.
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the_michael6mo ago
Just remember coffee grounds are acidic, so they help some plants but hurt others.
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janar636mo ago
Aren't used grounds closer to neutral?
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margaret_black466mo ago
But don't used coffee grounds actually become less acidic after brewing? In my experience, the brewing process washes out a lot of the acid, so they're closer to neutral than fresh grounds. @the_michael is right that acidity matters for plants, but it's the used grounds we often add to compost. For example, I've tested the pH of used grounds and found them around 6.5, which is pretty neutral for gardening.
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