Have you ever opened a bag of mulch, compost or potting soil only to find it is infested with white mold?

Have you ever found a white moldy substance growing on or below the mulch in your yard?

What is that white stuff on my soil or mulch?

It is likely just a harmful saprophytic fungus that is busy at work decomposing organic matter in the mulch or soil.

If the white fungus does not look string-like, it could be another fungus called Dog Vomit Slime Mold.

Is the white mold harmful to my plants?

It is not harmful to you or your plants, but some find it unsightly.

How can I get rid of it? Is it necessary to control it?

A light raking of the mulch will help aerate and dry out the fungus. Extreme means such as re-composting the mulch/soil to 140°F will also minimize growth, but is not usually cost-effective. Since it is actually beneficial and is not harming anything there really is no need to control it.