Heat Stress? (curling leaf edges)

hi

these seedlings/plants are like three weeks old. two of them are curling, but only the top leaf sets that were developing when I think I had my 400w hps too close and without air circulation in a confined space.

I moved the HPS higher and got a fan to circulate air as well as a HEPA air purifier with an ionizer.

could it be something else?

These plants are in miracle gro moisture control soil which has nutes pre-added in (its all they had left on the shelf at KMART so ive just been using the stuff and it works ok) could it possibly be too strong of nutrients?

this sort of happened before when I had the hps too close and i moved it further away.

this is my first attempt at growing, so it is pretty low maintenance...I am learning a lot by trying and reading this site constantly.

thanks

yeah man idk exactly what that is but i kno my plant got some heat stress today is a hepa air purifier good for a grow room? i have one right beside me in my room for whenever all my friends come over and we smoke down in the room.. i didnt kno they could be good for it.

its still curling and I am pretty sure it is not heat stress...I left the door to my closet open with the fan running and it was not stuffy in there all day.

any ideas? praying for magnesium?

thanks

have the same prob can any one help with this my ph is perfect the room temp is around 24-26 c and im running 2 400 sonti in coco and perlit mix i flush once a week and it drain to waste but also getting deformed leaves as well

One of my plants is doing the same thing, the others are doing just fine all are on the same feeding and watering schedual, I've moved my light higher and increased fan speeds thinking it was heat induced as well. The other plants however are showing no signs.

Ok i did some looking http://www.greenmanspage.com/guides/troubleshooting.html and all of my symptoms fall in Mg deficancy. My leaves have curled up on the edges like little boats and started showing signs of "spots" of necrosis but the viens remain dark. I may have too hard of water and is causing a lock out of Mg. Filtered water and some epsom salts for my baby. Hope this helped any.

It could very well be the PRE-added nutes in the soil..thats prolly it..whats the Ph?

ph in mine is about 7 just a bit under and im running half strength nuts just for now its about 4 weeks into grow.

zoids666 said:

have the same prob can any one help with this my ph is perfect the room temp is around 24-26 c and im running 2 400 sonti in coco and perlit mix i flush once a week and it drain to waste but also getting deformed leaves as well

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Why would you flush once a week?

I had the same problem recently, but not that bad. I managed to fix it. I grow in hydro though. Its a nute problem. You need to check your ph. I managed to fix mine with a ph control, and the addition of calmag. Hope that helps

my ph is 6.7 water temp 22.3 c and i flush once a week because im not lazy and i think it is good to remove any build up

zoids666 said:

my ph is 6.7 water temp 22.3 c and i flush once a week because im not lazy and i think it is good to remove any build up

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It was only a question. I have never read about people flushing once a week. Every does stuff different. I am not bashing your flush technique. Whatever works for you

nah i was just saying thats why i do it dude i feel prevention is better than cure