roots_indoors
Member
Soil is FFOF with 30% perlite and amended with dolomite. Have not fed any nutrients other than CalMag @ 1ml per liter of water for every other watering. Always ph’d to 6.4-6.6 and about 180ppm. Hadn’t had any issues with that for 3 weeks. Currently sitting at day 23-28 with these plants.
Canopy temps between 78-81 and RH average is 54%.
The only change has been that last Saturday I replaced my COB LED with a 200w QB and had it sitting around 28in. I gradually let it down to 26in. over the following days. On Tuesday, I started noticing the newest leaves clawing and now the tips have slightly yellowed. Across all of the plants. I moved the light back up to 28in but haven’t really seen a bounce back in the time after raising the light.
To my inexperienced eyes, it kind of seems like a nutrient toxicity, maybe nitrogen. But the lower growth fan leaves are doing just fine. Could the new intense light be causing the plant to suck up more nutrients from the soil? FFOF is pretty hot, and I could see that if the plant gets more light, it takes up more water and nutrients. Could the higher uptake cause a burn like this? It is happening to every plant in my tent to some degree. Maybe it’s light stress. I haven’t done anything irregular and the only variable that has changed is my light.
Canopy temps between 78-81 and RH average is 54%.
The only change has been that last Saturday I replaced my COB LED with a 200w QB and had it sitting around 28in. I gradually let it down to 26in. over the following days. On Tuesday, I started noticing the newest leaves clawing and now the tips have slightly yellowed. Across all of the plants. I moved the light back up to 28in but haven’t really seen a bounce back in the time after raising the light.
To my inexperienced eyes, it kind of seems like a nutrient toxicity, maybe nitrogen. But the lower growth fan leaves are doing just fine. Could the new intense light be causing the plant to suck up more nutrients from the soil? FFOF is pretty hot, and I could see that if the plant gets more light, it takes up more water and nutrients. Could the higher uptake cause a burn like this? It is happening to every plant in my tent to some degree. Maybe it’s light stress. I haven’t done anything irregular and the only variable that has changed is my light.
