i've used it outdoors in the past but quit and save it for indoors. i've found using any fertizer for tomatoes works great for cannabis but at half strength from what the directions state and only once every 2-3 weeks (and never on seedlings)...as in miracle grow, schultze's, and that other common one ya see everywhere but i can't recall at the moment.

for outdoor flowering, i use bloom or superbloom.