Baking Soda
It is not a permanent solution, but it is gentle, safe, and effective. ... Mix two tablespoons of baking soda per gallon of water and stir until it is well dissolved. Spray the mixture onto the mushrooms and the surrounding soil. Over time, this will reduce the growth and even kill the mushrooms.
Does baking soda kill mycelium?
The answer is no, it does not. Although it increases soil pH, like baking soda, lime only slows down mushroom growth, without killing them.
How does vinegar get rid of toadstools?
With proper application, the acetic acid within the vinegar will kill the mushrooms and hinder their return. Dilute white vinegar by incorporating four parts water to one part white vinegar in a plastic bucket. Use a funnel to pour the diluted vinegar into a spray bottle.