Whats wrong with this leaf? nitrogen defficiency?

[damnpolice]

Yo

my biggest plant has had a few leaves like this, some completely yellow, i have cut them all off.

looks like nitrogen def to me but would like a second opinion.

The leaves were located half way up the plant, and the top ones are much darker, although a few lower ones are slightly yellow still - i upped my ferts a bit and it seemed to stop.

Also, the yellow seems to appear only in areas where the leaf is in contact with the light...

peace

[devin313]

Originally Posted by damnpolice

Also, the yellow seems to appear only in areas where the leaf is in contact with the light...

i think you answered your own question.

[SmknVTEC]

Moving this to the sick plants section.

We need all the info on your grow including:

What type of medium; soil or hydro?
What brand and type of soil?
Indoors or outdoors?
What strain?
How old are the plants?
What type of lights and how many watts?
How far from the lights?
What, how much and when was it fed? NPK?
What is the medium/runoff pH?
What are the temps and humidity in the room?
What size pots?
Any bugs? Look real close.
Any other pertinent info?

If any of these questions have already been answered please disregard as I cut and paste this for everyone.

[damnpolice]

it cant be light burn, because theyre are higher leaves that are much darker + the light is way too far away

the plants are about 3 months old maybe a bit older, have been in guana soil, started giving them flowering nutes when 12/12 started.

like i said the problem seems to have gone now after increasing nutes

plants under a 600 watt hps

theres not much more i can say, it must have been a defficiency of some kind right? - on my biggest plant

im guessing nitrogen because it looks alot like it

why was it turning yellow ONLY in places where the leaf could SEE the light tho?