Grow big is all you need, I like to foliar feed with it too. 1/2 ts per gallon spray both sides of leaves and that lady will love ya for it. You should try cloning her. Here is something crazy for ya, one of my strains like N so much during flowering that I use an extra 2-3 ts's every watering along with my regular feeding of sensi bloom. You would think that it would burn them but they eat it up like there's no tomorrow
Actually I have been cloning her.. even in flower roots in like 7-10 days beautifully... I water about 1/4 gallon every 2nd-3rd day and go off my moisture meter... I just gave her 2 tsp in a 1/4 gal of distilled water(think that's enough water?), so hopefully that helps. I've thought about foliar spraying with grow big but wasn't sure if it was a good idea, thanks for clearing that up...
this looks like heat stress thats turning the leaves brown and drying them out.
possible problems:
pH fluxuation
lights to close to that side of the plant
stagnant air inside the grow space
fans pointed directly at the plants drying them out
its definitely not a nutrient defficiency. unless the leaves began yellow and were neglected.
Not the lights, it's one light fixture above the plant and this is seen in random leaves from the bottom to the top..
How would stagnant air only effect a few of the leaves?...
Using one 4'' fan which is directed at the light/canopy, no signs of this on canopy...