Getting Rid of Mold on Mulch

When the air gets humid, mold can begin to grow on your mulch. This is a guide for dealing with mold on mulch.


August 25, 2000 Flag
2 found this helpful


Does anyone have any suggestions on getting rid of mold/fungus on mulch in the flower beds?




One simple way to get rid of mold is to turn it over into the topsoil and wet it down with water. A second way is to loosen it up with a rake to allow air to circulate around it and help to dry it out. A third way is to remove the mulch and place it in a pile and soak the pile with water. When left to sit, the pile should generate enough heat to kill off the mold and fungus.

The most effective way to control the growth of mold is to change the environment in which it grows. Mold tends to grow best in warm, humid environments. And while you may not be able to control the weather, there are a few things you can do to minimize its ability to grow.

Mulch made from coarse wood products are less likely to have mold and fungus problems than fresh, finely ground woody products. Make sure to apply mulch no more than 2 inches deep (in warm weather) and follow every application by soaking it with water.

April 17, 20050 found this helpful

I have a vegatable garden and there is mold in the soil. What can I do to get rid of it.

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May 29, 20060 found this helpful

We have recently moved into a new home which has central air conditioning ~ The outside unit sits on the north side of the house and has recently been surrounded with mulch which is almost constanly in shade.

When I turned on the air conditioner for the first time yesterday, there was immediately a nasty odor being brought into the house and I began experiencing feelings of dizzyness and nausea last night ~ I'm quite suspicious that the mulch might be moldy ~ Is there some way I can determine if this is the case ?

Thank you so much ~


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May 29, 20060 found this helpful


Maybe it's not the mulch with the mold problem -- maybe it's the air conditioner itself. It probably wouldn't hurt to clean out your air conditioner. A heating and cooling company could help you with this.

I found this website that may be helpful:

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June 8, 20060 found this helpful

I have a flower bed outside that keeps growing some kind of weird mold in the mulch. When it first appears, usually in the evening, it is bright yellow. By the next morning it is all puffed up and brown and white. I haven't been able to find anything out about it. We do have a few cats. Could it be harmful to them, me or my children?

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Anonymous Flag
August 28, 20160 found this helpful
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