I had no problems using it for outdoors last year. Start it off very diluted for seedlings. I used 1 tsp per 4 gallons water for seedlings, until they were about a foot tall, then went by the directions on the box for vegetables, lowering it again as i got close to flowering, and supplemented with a 0-50-10 nutrient for the last 3 weeks of flowering, eliminating the MG nutes completley.
Its not a bad nutrient to use if you're on a tight budget, make sure you FLUSH the hell outta the plant when you are close to harvest.
