its young so i think its normaly for that color but i would be thinking of putin them in bigger pot so it don't get all root bound. as far as i know. ppl correct me if im wrong. but yes you can start flowering em you need to keep it 12/12 though thats the light you need to flower. less light the better but when theres no light.. let there be NO LIGHT. i think ppl do 6" - 1' plants and grow a bunch of them think thats the "sea of green'' method. anyways. keep up the growing.

stc