|Have read that mycorrhizae are abundant in nearly every inch of forest soil. Is there any good reason for me to spend money on mycorrhizal products from a vendor when I have direct access to forest soil? I could sprinkle a cup or two of fresh soil directly into each new planting. This would also seem to eliminate the problem of "shelf life" for any unused portions of store-bought mycorrhiza.
|Mycorrhizae occur naturally in healthy soil and are specialized to their location, so while adding some would certainly do no harm, it would be superfluous if your soil is in good health and would possibly not do much at all if it is unsuited to the soil you have. In my experience, "feeding" the soil with plenty of organic matter including compost seems to work well.|