Hello everyone!
I was hoping to get some feedback on what may be causing my plants to discolour. I’ll give some details.

2x Blue cookies photoperiod, week 5 flower.
5 gallon fabric pots
4x2x5” tent
Happy frog soil
Spider farmer 2000 Light
Temp day - 23c, night 19c
Humidity 43-48%
Advanced Nutrients Grow Micro Bloom
Growtek Mycorrhizae

I’ve been feeding nutrients every third water, with about 4 days between waters. Water water feed, following the feeding chart I’ve attached. PH 6.2-6.5

just over a week ago I noticed some yellowing/reddening on one plant, near the center of the plant. A few symptoms, such as praying and curled edges let me know my light was too close. At 12”, my light was recommended for 16-18”

I raised My lights, but after another week some symptoms have gotten worse. My plant seems to be turning purple, and yellowing. I’ve done research and it seems I’ve either got a P/K deficiency...or a lockout and a buildup of salts. I’m not sure if I’ve given too much, or not enough. Or maybe it’s not this at all.


When I water with nutrients, I water until what seems to be 10-20% runoff. When it’s just water, I try not to get much runoff. There’s a chance I watered with fairly cold water last time, which I heard could prevent some P/Kuptake.

This is my first grow, so I’m having quite a hard time diagnosing this and choosing a path forward.

Thank you for reading my long post and providing any insight you may have!!

I have done the same routine with the sister plant and it looks much better