Mushrooms pushing up Ashphalt

Asked August 13, 2019, 12:51 PM EDT

Mushrooms pushing up Ashphalt we had an Ashphalt driveway for 20 years and had it replaced four years ago. Late this spring and this summer we have had two separate issues of mushrooms pushing up through our Ashphalt. The first one was right next to the garage door foundation. The second one a month and a half later 10 feet out from that garage door. Would like to find out why this is happening and what we can do about it.

Livingston County Michigan

1 Response


When conferring with a mushroom specialist, Dana Richter, she has this to say in response to your question, "These appear to be a type of puffball called Scleroderma. There must be oak or pine trees nearby because these mushrooms associate with their roots. I have even seen them come up in basements also. I am not sure what can be done besides removing all trees nearby. They are not feeding off the asphalt. They are symbiotic fungi that the trees must have to grow.

Dana L. Richter, Ph.D.

Forest Resources & Environmental Science
Michigan Technological University