Need help identifying the deficiency...

[MH47]

Deleted by user

[Going2fast]

Raise it up 12"

[Going2fast]

I agree I looks like heat stress and nitrogen deficiency.

[dilvish]

yup looks like heat stress. If your temps and humidity have a variance of 5 it means you either have a crappy measurement tool or you are guessing. 5 degrees can make all the difference to some strains. for instance if you say the temp is 80 with a 5 degree variance, 75F is okay but 85F is likely too hot for that strain. Additionally that light is likely too close. It does look like a combination light burn and heat/humidity.

Move the light to 18-20 inches from the top of the tallest plant. correct your temp/humidity variance, water properly and feed regularly...she looks a little nitrogen deficient (pale).

temp should be a nice 80F (lights on) and 40% humidity at this stage in growth.

[MH47]

Deleted by user

[BigredTexan]

50% humidity +/- 5%, 80 degrees F +/- 5, This girl is about 7" taller than my other one and she has always had strange curly leaves that I have never seen before but never has she looked burnt like this. I keep the light a minimum of 12" from the top of the tallest plant but I will adjust and tilt to 16" on 1 side and see if that helps. I am running a Mars Hydro FC-E 4800 480W light at 100%. Should I turn it down?

[MH47]

Deleted by user

[BigredTexan]

I have two plants, different strains, in the same tent, same soil, same nutrients same light etc... one is super healthy, big and beautiful and the other looks like this....