I used last summer outside on a plant I was doing light deprivation on and it does stink,mine was a premixed and I was-/am still a newb so I used at full strength not knowing. It did a little burning but not bad,it did make me almost gag every morning when I uncovered. But if you dilute and use correct, probably pretty good product,I have used on blueberries and apple trees and work great .
STR8