WOW! they are really really stretched, but i am sure you are aware of that... i would suggest you to plant them in pots... make sure to put them deep enough down so the soil covers a lot of the stretched stem so it has some support. Fox Farm soil is a really good soil, use some lime and maybe even a drop of SuperThrive to help root development....

the weed is searching for light so thats why it stretches towards the light... try bringing the light closer but make sure to use the hand test (put your hand above the tip of the plant and hold for about 1min to make sure it doesnt get hot) or you can use some CFL's and you can put them really really close to the weed.

dont worry about nutes quite yet. Also try the FAQ section, you will discover a lot of info in there.