Leaves getting yellow and browning on edges in 3 days

Hydro setup
Late veg
pH 5.9-6.3
Water Temp 74-79
Air Temp 79-85
ppm ~450 (low on purpose)
using RO water and adding Epsom to supplement Mg
Using Botanicare Grow formula

Anyone have any idea what is causing this yellowing on the leaves and browning on the outer edges?

Thats a Zinc Deficiency 100% , and its in its late stage's so its really really bad , you need to get Zinc to your plants ASAP


Oh and lmfao , you need to clean out your Keyboard i can see under your keys in that pic

Here is one more picture if anyone else wants to chime in.

I guess this was also probably important to mention. It seemed to start the yellowing after moving them from under T5's to 1000W HPS. Could it just be that they are just starving and I need to up my overall PPM? I'm @450ppm but way way into veg. (my room just got completed to move these under REAL lights).

greenmonster15 said:

Here is one more picture if anyone else wants to chime in.

View attachment 2596685

Click to expand...

View attachment 2597393

This should help you with your plants , its helped me a lot with my first grow and im sure it will help untill some one makes a better chart

i use T5 in my Vegg along with dual 150watt CFL's , that's not a light burn so no worry's there

Thanks CodeWarrior. Your assessment seems to be spot on. Especially since Zinc lockout in hydro occurs at 5.7 and up and I have been running above that for a few weeks now. I have dropped it down to 5.5 for the moment and will give the ladies a few days to recover before I bump it back to 5.8.

Thanks again mate.