What do you look for to determine hi/low Nitrogen?

R

Randm

Active Member
I have checked the stickies and got some info, but nothing matches quite what I need to know.

First off info:
Growing in foxfarm OF under 400 watt hps lamps ( 6 of them ) in a 8 x 8 flower room

What I need to know is what are the 'signs' of over feeding? I am aware that underfeeding is characterized by a light green or greenish yellow tint to the fan leaves, at least that is what I have read so far.

What I am seeing on my fan leaves is a yellowing on the ends of the 'sawtooth' part of the leaves. Is this caused by over feeding or under feeding? The leaves are a healthy green so I assume it is not underfeeding. I may be wrong on that though. What are the FIRST signs of over feeding that you look for?

I'm trying to learn to read my plants, but I guess I'm pretty illiterate in my plant reading and am a bit confused on this.

No pictures, sorry, camera is loaned out at the moment.

I appreciate any help that you can give to clear this up for me, thanks in advance.
 
W

whymedeisgns

Active Member
excessive nitrogen causes mutations in my experience, low nitrogen causes yellowing and will stunt growth.

Ocean forest rarely has a nitrogen deficiency unless you've done something very strange to the soil.
 
Coho

Coho

Well-Known Member
Too much almost dark green/blue and clawing.
Too little gradual yellowing until leaf drops. Starts at the lower ones.
pH, too wet, burn, low K can get the sawtooth areas.
 
R

Randm

Active Member
So the yellowing on the sawtooth areas is not high N but low K ? Its just on a few plants and maybe I'm over reacting.
So Too high of N = blueish tint and twisted leaves, and burnt tips.
and Low N = yellowing on lower leaves.

Its not that I havent done my research, its just that there is so much contradictory info out there. It also seems that I can never find what I specifically need to know. Especially when it comes to Nutriants and mj.
Thats why I use the forums, because I want to get feedback from people who actually grow and know their stuff.

Thanks folks, I appreciate you taking your time on this
 
R

Randm

Active Member
lord ganja said:
If its just the tips its nuteburn. You can flush and give 1/4 strength nutes to fix
Click to expand...
Thanks a LOT. Believe me when I say I apreciate an honest straightforward answer to my question. I did flush yesterday and we shall see what the results are.
Again, thank you.
 
You must log in or register to reply here.
Top