Mushrooms in her garden
The person employs a gardener for her home garden. The gardener has told her there is a huge problem with mushrooms in the yard and recommends digging the whole thing out and replacing the soil. The homeowner believes that the mushrooms are growing on the roots of an old tree that had to be removed, and does not want to go to drastic lengths because her garden was very expensive to install.
The mushrooms from old tree roots will not hurt the soil. There is no need to destroy the garden and replace all the soil. Decomposing mushrooms will add organic matter and create new soil. However, if you want to control the spread of mushroom spores, you can pick them as they appear (suggest you use gloves) and add them to the municipal yard waste bags.
For further information, see the following link on the healthy meaning of mushrooms in the yard: http://extension.oregonstate.edu/gardening/mushrooms-can-mean-healthy-soil
Also, please refer to the following entries from the Ask a Gardener’s website:
http://www.torontomastergardeners.ca/index.php/askagardener/mushroom-in-the-garden/ Posted on June 25th, 2013
Both provide further explanation into the nature of mushrooms in the yard and their life cycle.