New crop of clones, how soon should I feed?

Just got a new set of clones. How soon should i start feeding them?
I know to start very diluted and work up but being my second crop I'm still unsure when to start feeding.
i have 6 northern lights, and six querkle
2 x 400 watt mh
Any suggestion on the strains would also be appreciated

BOO!!! 40+ views and not even so much as a question for me? i'm a little hurt.

Damn dude cool down. Some people just don't have the answers so they don't post. But to answer your question. Your in soil. All you need to do is let the roots fill the cups. Then transplant to 1 gal pots. Then to 2 then 5. Use good soil and no need for nutes till 3 weeks after final transplant.

sorry, i'm a little stressed...

i used super air pots last time. 1 transplant = less stress.
[edit]i'm told these will support a 6' plant[edit]
i do not know what soil they are in now, but i have sunshine soil to put them in.
hmm...
i've been keeping the lights a foot away from the plants, like i did last grow...

Some root stress is good. Just don't over do it.