Use Spent Mushroom Compost To Make New Compost
by Laurie Scott
Do NOT use spent mushroom compost directly on your garden rather, use mushroom compost to make better compost, by using it for composting. I am a small commercial composter and this is how I use it.
It is mentioned on your spent mushroom compost page that there is no microbial life in mushroom compost, RUBBISH! It is full of life. What grew the mushies in the first place?. My recommended ratio is one part spent mushroom compost to two parts overall of other compost material. Have some gypsum on hand for cation exchange(metabolism) and this will help with any saline problems.
Good luck everyone.