Proper water ph for peat-based mediums is 6.3 to 6.8ish. Any lower than that and you'll lock-out nutrients. Bump your ph up to mid to high end of the range.

You are overwatering/overspraying. Cannabis needs a wet/dry cycle. If you keep the rootball wet, root rot will set-in. Stop all spraying at least until this problem is resolved. Spraying is compounding the issue.

Feed per manufacturers instructions, not because you feel the plants need ONE of the micronutrients in it. I very-much doubt it's a zinc problem anyway.

Please provide a link to the nutrients and additives you use. I couldn't find General Organics online, and it's not something I've heard of in here.

Ask for help before assaulting your plants with inappropriate cures. You will do more damage than good.

Best to fill-out the troubleshooting form for a more complete diagnosis and treatment recommendations. (link is in my signature)
Rusty Trichome Reviewed by Rusty Trichome on . Yellow leaves, spots - First grow - White Russian - CFL I did some googling prior to this, but honestly I can't nail it down. I beleive the issue started after last feeding (4 days ago). This White Russian is a clone I gotten a month prior. Its transplanted into soil 16 days ago. While it went well it took a few days for yellowing to disappear. About 3 days ago it showed up again. At first it started in middle (I think) and only effected the lower and middle leaves. One is yellow, probably canary yellow, and some dark almost red spoting on edges Rating: 5