Mycorrhiza/beneficials in coco

if you are using 100% chelated, 100% available nutes (i.e. nutes for soilless/hydro context), then there is no benefit to myco. The higher levels of plant available P may even hinder its growth. it's supposed to help procure and breakdown sources of p that are not plant-ready. Proper soilless nutes already do this for you. it's ready.. it enters the roots, it's readily used in the plant as-is. So you'd get the parasitic effect (it definitely damages roots) with zero or extremely reduced benefit. even in a better context it's not 100% certain this stuff helps. I've always grown in a soilless. When i've used myco, it didn't do much in any noticeable way relative to the typical variance of one plant to the next. if you fortify it with amendments and treat it like soil and buy soil fertilizers, you want to put the myco in with the seed when you plant it.. then probably line the hole for your first transplant with it... after that it will grow in on its own. you want it growing with the roots early on. if you don't transplant, just that first inoculation. it needs roots to flourish.