Growing GG4 under Gavitas 3 feet away to top of biggest colas at 900 watts. Week 5. Soil. Feed feed flush system. Growth science nutrients. One day calmag, one day Bloombastic. The red stems and veins tell me its nutrient related. Its happening in the middle to top of plant mostly in middle of room with most of the light. Maybe a lockout or a deficiency? Not getting enough p/k? Too much light?
Doubt its a deficiency, I'd say its light intensity problems. My batch is doing this same in both veg and flower. Seems that the 10 degrees cooler and higher RH seems to have made them more prone to light stress
