Sticky Yellow Patches In Mulch - Knowledgebase Question

Woodbridge, VA
Avatar for ICStrickland
Question by ICStrickland
April 25, 2001
I have noticed from time to time yellow patches of some type of substance, that forms a hard outer cover, but when broken up, has a sticky yellow substance in it. This seems to appear in my mulch overnight. What is this, and is it harmful to children?

Answer from NGA
April 25, 2001
Welcome to the wonderful world of slime molds! These goopy fungi (Myxomycetes) live on dead organic matter and thrive in moist conditions. You can rake it out and dump it in the trash; especially in the early stages before it spreads its spores. Increasing the air circulation and allowing the soil to dry out will help eliminate the stuff. To help stop the growth of slime mold, just rake any mulch on the soil surface to expose it to air and sunlight. It's perfectly harmless - just revolting to look at!

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