Nitrogen toxicity issue?

Sorry for another question, first grow attempt…of any plant.

Noticed yesterday that my top leaf tips started to yellow, I assumed it to be too high of light intensity, so I adjusted the light up a few inches…they’ve gotten quite a bit greener in the past 24 hours, but then I noticed some of the tips curling down today.

Did some research and maybe too much nitrogen?

RQS wedding cake auto
FF happy frog, added worm castings, perlite and some coco (which I found out later wasn’t my best move)
Sprouted June 6, so day 32 of grow.

I did do some defoliating last week, but no signs of stress until yesterday

Cronk “Bonnie” nutes following autoflower schedule, Cronk calmag doing the same.

Runoff ph’d at 7.10, PPM only showed as 236.

If so, should I flush, or just pull back the nutes on the next feeding?

Thank you everyone for the help, you’re all great!


I would feed with a ppm that low, but with a ph of 7.1, i would ph your water at 6.0 for the next few waterings to try to get that ph around 6.5 to 6.0 for optimum nutrient uptake. You want your ppms between 700 and 1100. Ph 6.0 to 6.5 for veg, 6.5 to 7.0 for flower.


Here is a good shot of the beginning stages of nitrogen overload…

1 Like

Ues waxy is the look when too much N


What’s your lighting intensity Growmie :love_you_gesture:

1 Like

Thank you for the response! Feeding again tonight!

Right now, running a spider farms SF1000 at 60% intensity on the veg spectrum!


Do you know the PPfD or DLI? :love_you_gesture: