reply to privious grow question

Correct, nitrogen deficiency from switching to bloom nutrients too early. Cannabis still needs adequate nitrogen in early flower. I continue with grow nutrients for the first two weeks of flowering, then change to half grow and half bloom for the next 2-3 weeks (depending on flowering speed), before changing again to straight bloom nutrients through until maturity. This seems to produce the biggest blooms on plants that don't exhaust themselves and end up a sickly yellow colour by harvest time. Have been doing this for close to 30 years now and it certainly works for me!

may be nitrogen may be potassium deficiency, this chart may help identtifying the issue: https://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg on a side note it happen pretty often when you grow large amount of plant form the same strain a few phenotypse show some deficiencies/burns while all the others don't and while they all get the same feeding. Some phenotype are just more capricoious and sensitive to feeding than the others. you can adjust individually but i usually don't bother about it as usually it's stay in an acceptable range until harvest. Happy growing