I wouldn't use it to feed my plants, (outside of grass, because grass loves it) but i will use it to bump up the mg of plants. A little goes a long way, and they recover pretty quickly. IF you are using it to treat a MG problem and you don't see the problem go away in 4 or so days from a Epson salt feeding, DO NOT USE IT AGAIN, it's not your problem.

Also, i've found it will WACK out your PH'ed solution, so test after adding it to the water. Then bring it a little lower then what you would normal use. Playing it safe with something that can and will lock out your plants is the only way to go.

I wanted to foliar feed Stinky, but i'm so afraid of spraying my damn plants, i've had nothing but bad experiences