Hey peeps, most people are right mg is crap for growing weed! The cal and mag content is just not there! Mg is not and was not formulated to smoke the end product! Has a real nasty taste that is next to impossible to flush out! I flushed for 2 weeks and still taste like crap! That was in my early years! I have tried mg,peters, an and several more of the "engineered for weed" ferts and most are over priced h2o! I will not high jack the thread with my nut line that i use, but willl tell you there are a few good cheap nut lines out there that will blow mg and the above said ferts outa the water! In all fairness to AN ferts i have had some very nice grows with them and do like the end product, but I spend weeks on the phone with there reps and always got a different schedule for there product line! They also kept telling me to purchase this and that and just spend more money!! Well i basicly use 2 powders, 1 liquid and 1 supliment now with amended soil. very cost effective and just as nice grows as anything i have used in the past! B safe