I dont think mushroom compost is a good source of nutrients. Sure, good addition of organic matter but, think about it. It has been twice depleted of it's nutrient content- once by the horse or whatever animal 1st ate the feed, and then again by the mushrooms. Just my opinion.

Woohoo 1st post!
mickey14 Reviewed by mickey14 on . Mushroom Compost Thinking of doing a grow out of straight mushroom compost with some earthworm castings.. Picking up a truckload to fertilize the garden this season, so I was gonna use some on my clone grow and keep it completely organic this round. Any thoughts?? Is the PH of mushroom compost not good being about 5.5-6? Rating: 5