Stickanswered grow question 7 years ago Hi there! On the first sight it can look like a Potassium deficiency, but I think it's not. Judging with the infos onto your diary I think your meals are correct and they get enough Potassium. My opinion is that they suffer from light-stress, they're too close to the light and these are also the same symptoms as a P deficiency. Make sure it's not a light stress by increasing the distance and see how it goes. I'll be around, keep us up-to-date so we can help you adjusting your parameters, and happy growing!