HELP.

can anyone identify the problem? I see it as a nitrogen def.

Set up:
week 1 flowering.
Gavita lights.
Co2 - 750 PPM
Humidity - 50%

yellowing leaves and declining by the numbers.

to me, it sort of looks like you have purple stems indicating a possible P deficiency if you're not dealing with cold, or naturally colorful plants.

What have you fed them? Have they been getting CalMag? What medium are they in(coco, pro mix maybe)?

DerrickZoolander said:

can anyone identify the problem? I see it as a nitrogen def.

Set up:
week 1 flowering.
Gavita lights.
Co2 - 750 PPM
Humidity - 50%

yellowing leaves and declining by the numbers.

Click to expand...

I'm on my first grow but I'm using hydroponics. One problem that I had early on was ph issues (i didn't have a ph meter, but the drop method with the vial). When I got me a ph meter those problems disappeared. I'm not saying it is your ph but if the ph is off then it could make it look more like a nutrients problem. Push comes to shove, flush that soil out and then start the appropriate feeding regimen with correctly ph'd water for soil. I haven't studied soil growing nearly as much as I have hydro but this is just my two cents.