Burmeseanswered grow question 3 years ago Hi there,I am not very sure but have to agree with gmslave.It looks like potassium deficiency.But before you take any corrective action, make sure your water pH, ppm(EC) and run off are in corrected range.If you are growing in soil, keep your pH around 6.0~6.5 for both of your water and run off.Check run off ppm and compare how much different between in and out.Good luck and Happy Growing... โ๏ธ