MG...sure as well as Ferti-Loom, Schultz, Dyna-Grow...etc. but if you want to grow "ye ole fashion way" you'll do it "Organicly" with well aged compost, manure, bone and blood meal, and garden lime... I use certain ferts. such as MG in moderation, less is more, nothing worst than having your plants look their best....then all of a sudden...fertilizer "Burn"