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Make Your Own > Garden on December 21, 2011

Sterilizing Coffee Grounds for Plant Fertilizer

Using coffee grounds without heating for indoor plant fertilizer has produced flies.
How long do I bake and what temp is good to sterilize them?

By Lee

Answers: Sterilizing Coffee Grounds for Plant Fertilizer

Read answers for this question below.
By
12/27/2011

They have been boiled, are as close to sterile as anything. Mix well with soil, add minerals.

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