I’m on my second grow and I feel like I’m noticing a Potassium Toxicity – though I’m not sure. I would appreciate any guidance you can provide.
Here are the deets:
Strain: Blackberry Kush
Medium: Soil (Roots Organics Original)
Amendments: Earth Dust Nutrients (Base) and Worm Castings
Watering with RO water + Cal Mag and just started Drops of Balance.
Space: 4×4 grow tent with MarsHydro TSW 2000 (just raised it to 50% at 24in above plant).
My question: I feel like the leaves seem a darker shade of green than what I remember from my first grow and there is definitely a bit of interveinal discoloration happening.
A few weeks ago, I noticed that some of the leaves were twisted and edges of the leaves were turning up (making it even more serrated) and I assumed the temperature was too high.
However, I’ve been consistently between 75 – 82 degrees F and 66 % humidity. I’ve also made sure to keep the light 24in away as the plant grows.
About a week later, I noticed one of the NEW leafwas growing slightly deformed (curling on one side) and with a copper discoloration to it. It has continued to grow despite the discoloration, though. I started to supplement Cal/Mag (5ml per gallon) and also bought some Drops of Balance and added it to my last watering (3 days ago). I’m now starting to notice some small yellow/copper spots in the lower and middle leaves. Could this be a potassium toxicity showing up as several deficiencies?