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Sorry man, I answered you ages ago but it seems to have got lost.... Did I imply that pH exclusively causes interveinal chlorosis ? Sorry. 'Didn't mean to say that. What I meant to say was that a seriously out-of-range pH can cause nutrient lockout, such as the nutrients responsible for...

sorry, didn't answer that suggestion : No can do now as i've put the plant in the ground, its outdoors 12/12 time, and she's flowering nicely. Besides I can't go to 12/12 indoors right now - only one room to work in presently and I'm occupired with my new seedlings.

In 25 years of indoor and outdoor growing I've seen several type of chlorosis, most of it interveniously since the majority of problems have been an iron or magnesium deficiency. If nitrogen is the problem then yes, the chlorosis looks different, or something preventing Calcium uptake. But look...

Interesting you should say that the ppm's of co2 might be too much. I always was of the opinion that this 1500ppm 'ideal' for cannabis was unfounded heresay that somehow became gospel in our world. There's no scientific evidence for it that I've ever found, simply anecdotes about how plants grew...

Thanks again, mouse. As i pointed out in my original post, I'm now starting seedlings once again. I now have fresh air, they're under flouros, watered with ph adjusted water, they're growing at a 'normal' rate, yet if you look at the pic of the young seedling in my post you can already see the...

Hi mouse. Good question. I thought about that myself. My new room was a sealed room initially. Got a co2 gen. running producing 1500ppm. With the chlorosis issue on the first run I decided to install a ventilation system for the co2 issue you mention and just in case there was some type of...

Hi, and thanks for your interest. In the hardening off period the plant was sheltered from rain, and when I put it in full sunlight, yes it got some rain but not much.

Hi friends, I’m on my knees ! This problem has beaten me so far and ANY help/advice would be hugely appreciated. I moved to a new indoor grow location some months ago for security reasons after 5+ years happily growing in my original place. The intention was to grow out some new mothers and...