hi everyone these are my girls, but im worrying about some of the leaves dont know whats wrong but they are developing these yellow edged leaves can any 1 throw any light on the problem.

Any help would be much apprecieted and a great weight off my mind...

regards herbal
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Looks to me as that is exactly your problem,the light too close or poor air transfer

Owd

look like they want potting up
RK

Have you been feeding them anything?

it aint air mate ill bet my left one on it but i did give them a little spray with water about 2 weeks a go river king told me it was stupid but im still a bit green... could this have that effect...??

regards herbal/

tomorlite you reckon that could do anything bish

You shouldn't need to feed them in veg, the compost should have all they need. That could well be nute burn. Though they do look a bit big for those pots, how long have they been in there?

600w bulb,only 4" extraction with 2 pc fans as intake,in a 2x4x5 room

Owd

only 400w mate had to drop it temp in room avg 80f

Does that mean your running a 400watt bulb in a 600 ballast or have you changed the ballast also ?

But either way, your temp problems are due to your extraction, you cant run that room on PC fans, it just wont work...


edit: And to me your pics look over fed, probably in P or K (too stoned to figure out which)... could be wrong tho, just my 2p on the posted problem.

maybe to much nutes

only intakes are pc and there is plenty of air movement extraction fan is very strong plus got a desktop moing air around in there if i sprayed the leaves with water constantly under that light intensity would that cause that ??? and whats p or k??????/ regards herbql

Dont spray plants with water.

Nitrogen (N), Phosphorus (P) and Potassium (K).


edit again: I didnt read your profile properly, and missed your extraction. If the 4" extraction you are running is a RUCK/RCK etc then the intact PC fans wont help much. Turn them off and run the intake passive.

[quote name='squirrel' date='Mar 29 2008, 10:44 PM' post='1284613']
You shouldn't need to feed them in veg, the compost should have all they need. That could well be nute burn. Though they do look a bit big for those pots, how long have they been in there?
[/quoteonly been in theer 3 days .......

woh woh woh break that down for me what do you mean"Turn them off and run the intake passive." regards.........

Passive intake means not using fans to bring air in (your PC fans), but letting the extraction pull the air through the intake holes (your 4" ruck ?)

use your 4" fan as your extract and use these as passive intakes Click to view attachment
i've got 4 at the bottom of my gr about 6" off the floor.

as for the npk thingy, i think he means it's far to early to be feeding them anything, there's enough nutes in the compost to last for about 2 weeks after potting.

how long have they been in those pots they look desp for a pot up

will that be eough oxygen and they only been in pots for 4 days they were huge cuttings... m8 huge....

I don't agree about turning the PC fans on the intake off, IME they do help the intake quite a bit. But if your intakes are very small making them bigger would help. I woouldn't use those vent covers, they restrict the airflow far too much.

Average temp isn't all that much help, you need a high/low thermometer, cost about £10.

they are only vegging mate ive got high low mate 90f high 80f low...........

way way too hot thats the problem m8

Had another look at the photos and just wondered if it could be lightburn caused by spraying,
R.K.

Deffo (N) burn, coupled together with what others have said - high temps, lack of Co2...& whatever you do, don't feed them Tomorite again until they need feeding, which ain't for a while.

You need to sort your environment out first & foremost, or you won't be growing anything mate.

thats what mine looked like when my fan went down lights on. by time i discovered it i had those brwn patches, but nothing on the tips.

so poss an overheat, and maybe an overfeed coz of the tipps .....

A peak of 90 F is more than 32 C, which is too high. Anything over 30 (86 F) is too much, and really you should be aiming for a top of 28 C (82 F).

And everything Bish said. You need more airflow.

temps are middle 80s mate ive sorted plants out and heres a quickpeak thanks buddy

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Looking alot better