The Q&A Archives: Mushrooms

Question: My lawn has been overtaken by wild mushrooms/toadstools. What can I use to kill them and not kill my grass?

Answer: Mushrooms in lawns is a pretty common event. The first thing to understand is what causes mushrooms to grow on a lawn. Lawn mushrooms are a fungus and this fungus has the job of helping to breakdown decaying organic material. Unfortunately, in the average yard, there are plenty of sources of decaying organic material. Decomposing tree roots, animal waste, old mulch and grass clippings can all spread and feed lawn mushrooms.

Lawn mushrooms like damp, shaded and organic waste rich environments. Is it possible that you have a drainage problem which contributes to the lawn mushroom problem? Do you have organic waste that should be removed? Are there areas of your yard very shady?

To eliminate mushrooms in the lawn you need to correct the problems that you have in your yard. If the lawn is too wet, are there things you can to reduce the moisture. Raking your grass clippings, dethatching your lawn or replacing old mulch will help to reduce the decaying organic material that encourages mushrooms growing in lawn. If your yard is too shady, see if some prudent and targeted pruning or thinning of surrounding trees can help to send more light into your yard.

You can simply rake the mushrooms up or you can treat your lawn with a fungicide, but if you do not address the issues that cause mushrooms to grow in your lawn, chances are that the mushrooms will just come back.

Best wishes with your lawn!

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