New question: I'm planning on reusing old ffof soil from last grow and mixing amendments with it, well I noticed my big barrel of soil has acuired a dirty wet laundry/mildewy smell to it, does not smell much like soil, will it still be okay to use?
I just don't want to put my plants roots in some bad soil or something that will give them root problems like root rot.
Here's what I plan to amend the soil with, ewc will also be mixed in with the soil. I've read 1/3 ewc, does this still apply to reused soil? And peat moss is not necessary because it's reused soil so already has old peat moss right? Wilas planning on mixing the amendment mix together and then adding around 2 cups of that mixture per cu. Ft. Of soil.