Leaves curling up at edges

[brainfood33]

Hi,

I've been growing this Jack Herer from seed and they're just coming up to 2 weeks in veg.
Its a hydro setup and they are under a 400W metal halide which is 11 inch from the tallest plant.
They have only just made it to full strength nutes after spending the first week getting 1/4 then 1/2 strength before hitting full strength a few days ago.

The problem though, is that most of the plants are showing this leaf curl in varying degrees.
It starrted on the lower leaves but now new growth is doing it and I'm getting worried.
I can't see a corresponding symptom in th faqs so I hope someone here can diagnose.

Many thanks.

brainfood33 Reviewed by brainfood33 on 11-25-2007. Leaves curling up at edges Hi, I've been growing this Jack Herer from seed and they're just coming up to 2 weeks in veg. Its a hydro setup and they are under a 400W metal halide which is 11 inch from the tallest plant. They have only just made it to full strength nutes after spending the first week getting 1/4 then 1/2 strength before hitting full strength a few days ago. The problem though, is that most of the plants are showing this leaf curl in varying degrees. It starrted on the lower leaves but now new Rating: 5

[Weedhound]

You feed 2 week old plants three times? With one full strength? Can you say major league nute burn?

[Weedhound]

Wait ....hydro......what are you doing? They look massively burned and i'm sure they are.....but what the heck are you doing with the nutes? I think you'd better explain fully exactly how you are nuting these seedlings. Ad what is the ph of your water?

[Weedhound]

Start here:

http://boards.cannabis.com/plant-pro...anted-one.html

[brainfood33]

Remember it is in hydro so it is being watered constantly.

The plants aren't 2 weeks old they are 2 weeks in veg which is after 2-3 weeks developing roots under fluorescents.

I didn't think overdoing the nutes would have this effect and when it started whilst on 1/2 strength, I felt it was actually a nute defficiency after reading this site.

[Weedhound]

I think you have a HUGE amount of reading to do. Overnute and/or abnormal ph.....Good luck. \

allow me to ask however....your room temps? Somebody fooled me other day.....his room temps were 102.....if yours are way up there that could do it.....but I'm pretty sure its the nutes/ph.

Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com

[brainfood33]

You think they look burned?
I really don't think this is the case because I thought when you burn them, you literally get burning to the leaves and major discolouration and death.

These plants are green and generally healthy as they are growing and thickening at a staggering rate.

The PH is around 5.5 and I use a 3 part brand name (Advanced Hydroponics) and follow the directions on the label which per 100 litres of water is 60ml/30ml/30ml for vegative growth at full strength.

[brainfood33]

I HAVE done a huge amount of reading and I am just getting back into it again after about 10 succesful grows a few years ago so I am no newbie!

The temps are around 70f when lights are on and about 60f when off.
Humidity is between 40 and 50%.

You seem convinced its nute burn.
I would like to hear other opinions too please.

[Weedhound]

Oh....THEY WILL....give them just a little more time. They are on their way as we speak.

Good luck.

[klondike_bar]

IM HERE!!!! lol

id agree on the nutes or ph. while its not a "burn", its definitely looking like theres an overdose of something, especially since it started at the base and ran up signalling something in the water.

check the ph and stop the nutes for a few days to see if it helps.

also bring the lights within about 8inches, they look old enough to handle that and itll give em more energy