Out of all the products you listed, the only one I see available at any local mainstream nursery is Ca/Mag. I see so many of these "plant enhancement" products aimed at MJ growers, and I think to myself, If they were so good, WHY aren't they available at any mainstream gardening centers or nurseries? Do other gardeners use any of these products? MJ is a plant, no different from any other, and I would think that if someone had "built a better mousetrap" or re-invented the wheel, the whole gardening world would be beating a path to their door. I'd say some of them do have some value, but no more than can be obtained in less expensive ways, however, I think most of it is snake oil.