Your first picture is very telling. Do you see how the water is sort of pooling along the veins?

I suspect that your foliar solution is pooling and as it dries it gets concentrated enough to burn the leaves.

I would hold off on foliar feeding for a while.

When you resume, try feeding with the lights on, with a surfactant and weaker solution, so that the water evaporates before it has a chance to evaporate, and doesn't bead up.

The last picture shows a bit of nute burn on some of the lower leaves.

On the up side, those are very nice bushy plants!
stinkyattic Reviewed by stinkyattic on . need a little advice on plant problem.? plants are still yellow at the bottom, on just about every single one of my plants.. looks like the leaf's burnt to the inside on each one.. i'm worried about that but not all too much, b/c the top growth is coming in.. i do though have 1 plant that is browning in small speckles on sets of leaf's.. real weird, when i originally saw it about 5 days ago, thought it was some dirt that got on the leaf, and i tried to brush it off and felt how dry that leaf was and found out it wasnt coming Rating: 5