No..Do not feed your plant until it is at elast 3 weeks old then the first feeding only feed 1/2 the recomended amount. For vegging you need a higher N... N-P-K something like 10-5-5
I usually never feed a plant till it asks for it.... (any little color change on diffrent spots of the leaf is a diffrent order for food) Edit : I dont mean to bring in other sites than GrassCity... but i dont know if we have as good of a compilation of color changes... http://www.icmag.com/ic/showthread.php?t=11688 dont let it get to an extreme of killing parts of the leaf... but keep a good eye and you will know exactly what your plant wants from you...
ya as soon as i noticed a nitro deficiency i ferted my plants and that worked, it was about 2-3 weeks old, which i guess is about the time to start feeding.