Arts and Entertainment Can I eat mushrooms that grow on my lawn? Can I eat mushrooms that grow on my lawn? Lawn mushrooms are not generally poisonous to humans but as a precaution, it's wise not to try eating them unless you are 100% sure that you can identify them accurately. Do not eat them unless you are 100% sure you have identified them correctly. Related Posts:Fresh mushrooms can be preserved.Prepare Oyster Mushrooms.How To Prepare Oyster Mushrooms.Are mushrooms that grow in your yard poisonous to touch?