yellow/green banded leaves o.O

[Douglas1]

what the heck is going on guys?

4 girls are in coco, 2 in hydro, and one in soil. all of them show the same symptoms, some worse than others. one was started very recently and has the same issues.

extremely stunted growth in all but the hydro one (big one in pics), and that crazy banding.

I'm feeding with spring water from our property, and gh nutes.. cannazyme and rhyzotonic.

I have looked all over the internet for photos of similiar looking ailments, but the nearest thing I could find was a sulpher deficiency..

the colorations starts with the newest growth, this made me think light sensitivity.. but a light bleach or burn would turn spots white, rather than this crazy banding..

anyway, here are the pics, any clues? they were all under a 240watt blackstar veg light.. but I took it out just incase too much light is the problem. I'm now using a 240w flower.. less efficient, so hopefully less chance of light stress, but I'm about ready to throw in 5 cfls..

think it could be the lights? Attachment 283390Attachment 283391Attachment 283392

Douglas1 Reviewed by Douglas1 on 03-13-2012. yellow/green banded leaves o.O what the heck is going on guys? 4 girls are in coco, 2 in hydro, and one in soil. all of them show the same symptoms, some worse than others. one was started very recently and has the same issues. extremely stunted growth in all but the hydro one (big one in pics), and that crazy banding. I'm feeding with spring water from our property, and gh nutes.. cannazyme and rhyzotonic. I have looked all over the internet for photos of similiar looking ailments, but the nearest thing I could Rating: 5

[Douglas1]

no ideas out there?

[gonnagrow]

I tried something Advanced Nutrients recommended to me and measured the PH of the runoff. It was 4.8 according to my meter. My jaw hit the floor. Took about 3 days of flushing to get back to 6.0. The damaged leaves do not seem to repair themselves but new growth begins. Just my own experience.

[Douglas1]

runoff ph of the coco girls is 5.8-6 typically.. the others are in hydro, and the tank stays between 5.6-6

[Cyclonite]

This has to do with the lights.....how close do you have them? I think it may be a bleaching. Im trying to figure this out myself now

[JeffersonStateGrower]

The banding of color on the leaves is called intervenial chlorosis, and if left unchecked can grow to general chlorosis, or a complete yellowing of the leaf. Chlorosis is typically caused when leaves do not have enough nutrients to synthesise all the chlorophyll they need. It can be brought about by a combination of factors including:
-a specific mineral deficiency in the soil, such as iron or magnesium
-deficient nitrogen and/or proteins
-a soil pH at which minerals become unavailable for absorption by the roots
-poor drainage (waterlogged roots)
-damaged and/or compacted roots
-pesticides and particularly herbicides
-exposure to sulfur dioxide
-overabundance of calcium in the soil

Best of luck
JSG

[Douglas1]

well, it was either what you said above, or the lights.. I'm inclined to believe it was primarily the lights. I swapped out my 240w veg led panel for a 240w flower that I've had for a year or so and used.. so the leds are a bit dimmer.. (thank god for poor quality control) the flower models are sfomething like 20% less efficient for veg than the veg panel, so now everything is good to go.. the dwc plant was the first to recover and is growing a new set of leaves nearly daily.. as well as substantial root growth..

thanks for all the help!