The Q&A Archives: issue with mold in mulch

Question: We had an indoor mold issue and some of the mold spores from inside the wall ended up 'blooming' in the mulch! We have been working at removing the mulch completely but is there any hope to turn the mulch into the clay soil to amend the soil without the mold spores being an issue?

Answer: Your idea is a good one! Sometimes very little can be done to control nuisance fungi other than to spade the mulch into the surface soil layer followed by soaking with water. Another option is to remove the mulch, place it in a heap after thorough wetting to allow for self-heating to occur (110-140 degrees F). This will kill nuisance fungi. If fresh dry mulch is placed on top of mulch colonized by nuisance fungi, the problems may occur again the following year or even earlier.

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