Quote Originally Posted by deranged chipmunk View Post
as promised. this is what i use Heather. it is chock full of all the good stuff plants love, coco fiber, peat moss, perlite, pumice, compost, mulch, worm castings, bat guano, kelp meal, fish bone meal, soybean meal, feather meal, greensand, leonardite and alfalfa meal.
So this soilless growing medium has compost and mulch....would an organic mushroom compost work? I checked with the local company that sales the said product and the ingredients would not be harmful...just a bit different composition then your mix Bill. It would be easier to find a needle in a haystack in my area then a hydro store.