Cissy
Active Member
I am on my 2nd set of seedlings here. The 1st generation suffered through much of the same. Lots of dead spots on the leaves apparently out of nowhere. I was initially told it was mites, but that was eventually ruled out. So then I was told that it was a magnesium deficiency, due to the dead spots and stunted growth, but I added Cal-Mag and the problem is still persisting.
Most of the 1st generation plants I have are no longer getting the dead spots, but most are not growing (2 months old and still hovering around a foot tall). And all of the new ones are suffering just as the 1st ones did despite my adding H2O2 and the Cal Mag into the mix.
DWC system btw. R/O water. More than enough air being pumped into the water. Using Advanced Nutrients Sensi Grow A & B. along with the Cal Mag. I am religiously adjusting my PH and it is never below 5.6 and never above 6.3. Roots seem to be developed nicely on most of the plants.
PPM on the larger plants (which are 2+ months old) is at 800, PPM on the smaller plants (which are 7 weeks old) is at 600PPM. So I don't think that it's nute burn..
The pics are of the young ones, but keep in mind that they are not THAT young. 7 weeks from seed now. but they have not grown for the past couple weeks(none of them are taller than 6inches). They seem OK for a couple days, but then the leaves start dying. Usually its just brown dead spots that leads to the leaves completely dying, but now I am getting some drooping and yellowing leaves (1st time seeing either the drooping or the yellowing).
I am at a loss.
Most of the 1st generation plants I have are no longer getting the dead spots, but most are not growing (2 months old and still hovering around a foot tall). And all of the new ones are suffering just as the 1st ones did despite my adding H2O2 and the Cal Mag into the mix.
DWC system btw. R/O water. More than enough air being pumped into the water. Using Advanced Nutrients Sensi Grow A & B. along with the Cal Mag. I am religiously adjusting my PH and it is never below 5.6 and never above 6.3. Roots seem to be developed nicely on most of the plants.
PPM on the larger plants (which are 2+ months old) is at 800, PPM on the smaller plants (which are 7 weeks old) is at 600PPM. So I don't think that it's nute burn..
The pics are of the young ones, but keep in mind that they are not THAT young. 7 weeks from seed now. but they have not grown for the past couple weeks(none of them are taller than 6inches). They seem OK for a couple days, but then the leaves start dying. Usually its just brown dead spots that leads to the leaves completely dying, but now I am getting some drooping and yellowing leaves (1st time seeing either the drooping or the yellowing).
I am at a loss.