Hey everyone,
I have a problem with my 3 week old autos.
I'm running Canna a + b, and calmag (starting at 250ppm, now 500ppm total), basically following manufacturers chart. PH is 5.8 - 6.0, 70% RH, 75f temps.
I've basically had this problem since seedlings - tiny yellow spots that continue to spread (eventually twisting the leaf slightly), and streaks of yellow, which are worse on the old (bottom) leaves. I've checked with other forums, and the advice varies wildly:
-Lights too bright, too low (changed)
-EC too low (changed)
-Add potassium bicarbonate for buffer (haven't done this yet)
-I have Zn/B deficiency with excess K
-I have Manganese toxicity
Nothing seems to help and I don't understand why I'm having this issue following the same manufacturer directions as others?
I've checked for pests constantly and cant see anything. Help!
I have a problem with my 3 week old autos.
I'm running Canna a + b, and calmag (starting at 250ppm, now 500ppm total), basically following manufacturers chart. PH is 5.8 - 6.0, 70% RH, 75f temps.
I've basically had this problem since seedlings - tiny yellow spots that continue to spread (eventually twisting the leaf slightly), and streaks of yellow, which are worse on the old (bottom) leaves. I've checked with other forums, and the advice varies wildly:
-Lights too bright, too low (changed)
-EC too low (changed)
-Add potassium bicarbonate for buffer (haven't done this yet)
-I have Zn/B deficiency with excess K
-I have Manganese toxicity
Nothing seems to help and I don't understand why I'm having this issue following the same manufacturer directions as others?
I've checked for pests constantly and cant see anything. Help!