Do I need to add myccorhizae to potting soil? Aside from actually buying the myccorhizae, is there a way to introduce it to something like ProMix? I grow some veggies, a lemon tree, etc in pots as well as ornamentals. I have access right now to bagged mushroom compost and homemade worm compost but don't know if that would contain the myccorhizae that I might need. My outdoor yard waste compost bin will remain frozen for a few more weeks.
