Can i put plants 2 weeks old in with older plants?

Hi every1 just a quick question...i have 4 silver haze plants that r coming along very well but got 4 cronic plants 2day that are 2/3 weeks behind the haze in progress. is it ok for me 2 veg them all 2geva n flower them all at the same time? would of just thought the haze would been a bit bigger than the chronic am i right?
Really could do with some opnions on this 1.

yup you can.

sure don't see why not
you just might get a smaller yeild out of the cronic plants
cause there behind in veg from the others

but thats just my opin.

yeah thats wat i thought thanks.....but wat i was going to do is grow the chronic for the weeks i wanted veg them under anyway so just means the haze has a 2 week head start so should yeild a bit more....i hope. thanks for the 2nd opnion guys. happy smoking.