mushroom compost not using fertilizer?
I have a question concerning using mushroom compost and fertilizer. I ordered mushroom compost for the 1st time this year, planted the garden May 15th. I incorporated it into my clay soil and also used it as a top dressing. The tomatoes as well as other plants are doing very well and I have not used any fertilizer this year (I also have some compost and rotted leaves, etc. I have been adding to the garden for years). The landscape company that delivered the mushroom compost stated I should not fertilize at all or I will kill my plants, they claimed all the nutrients are in the mushroom compost. I have heard the same information from other sources. Can I still use fish fertilizer once a month like I did last year? Or will I hurt the plants. It just feels weird not fertilizing at all. Thank You