Some growers put their soil in a steel pan and bake it in an oven for 15-30 minutes @ about 350 degrees.

That works OK for potting soil.
Dutch Pimp Reviewed by Dutch Pimp on . Soil storage? Any suggestions as to how to store your bagged soil? I have the remains of a 40# bag of composted cow manure and humus and want to make sure it remains "clean" for next use. I recently glanced into the bag and noticed a small spider hanging out, and at least one white flea like bug (looking at the two insect descriptions I gave... I'll assume the second is a spider mite :jointsmile:). I lightly sprayed the soil surface with a neem oil solution and left the bag open so it gets air. I don't want Rating: 5