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Hyacinth Plant

Q.mold/fungus/mildew in horse manure used for garden

Anonymous added on July 5, 2015 | Answered

I find quite a lot of white sticky and white flaky substance within clumps of composted horse manure I bought. Is it mold? Will it harm vegetables I am planting in the compost?

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Certified GKH Gardening Expert
Answered on July 5, 2015

This is simply a sign that the composted manure has been sitting or aged awhile, resulting in either actinomycetes or fungus mycelium. Fungi and actinomycetes in the compost is a good thing. There are different types of actinomycetes bacteria present in compost and each has a very specific role--all of which are important. In short, the compost should be perfectly safe for mixing into the soil around your veggies and plants.

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