what the hell is this?

what is wrong with my plant?

It might be light burn or you need a element. Anybody?

It's definitely burnt, but could be too much nutrient (best guess), low humidity, or phosphorous deficiency.

Plant Abuse Chart and Photos by Nietzsche look in here first..rob

robert 14617 said:

Plant Abuse Chart and Photos by Nietzsche look in here first..rob

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Great information, thanks...

, GRRRRRR, I COMMENT ON A PROBLEM LIEK THIS YDAY WITH ANOTHER USER, AND NOW, OVERNIGHT,

THIS HAS HAPPENED

your light shrank and moved too far from your plant causing it to stretch?

No ! , check the leaf edge , yellow !!!!!! And dry by the looks of it

You guys are feeding your plants too much!

Watering them to much ?

mercer88 said:

Watering them to much ?

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Soil could be too hot or you could be using too much nutrient.

Its in rockwool, and they are 12 days old, ( no nutes " yet" )

mercer88 said:

Its in rockwool, and they are 12 days old, ( no nutes " yet" )

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What's the EC of your water? If none of that explains it, you're down to temperature and humidity. There's only so many things to go wrong bro. I'm not going to play this guessing game anymore so if you want to know, you'll have to list every detail... and maybe in a new thread too.

its either
1. Heat stress (less likely)
2. overfeeding nutrient burn. Flush soil with bottled water for a few days.