That fertilizer is pretty high in nitrogen. Your plants are yellow because they haven't had enough of it. I don't know anything about growing weed, but your plants are definitely starved for nitrogen. I think I'd give them a bolus of 1 tablespoon per gallon, then water with a weaker solution, maybe 1/4 teaspoon per gallon.

Of course, Stinky and the other grow heads may tell you to switch to a different fertilizer. And remember, I don't know what the favorite veg fert analysis is, or when to switch, or what to use for flowering. All I do know is that your girls are starving for N.