FNG Grower
Well-Known Member
My girls are in their 7th week of flowering and have suddenly become more sensitive to the HPS light. They stopped stretching weeks ago, so the bulb distance hasn't changed, but the leaves that are directly beneath the bulb have started yellowing while everything else looks great. The closest cola is 20" from the 1000W bulb with ample air movement, but even leaves that are nearly 30" away are yellowing. I've been going very light on the nutrients (half the recommended concentration), and I'm wondering if the intense light combined with a nutrient deficiency could be causing the problem. I'll post some pics tonight under normal lighting. Any thoughts?