Veg question (LONG VEG?)

Can i veg a plant for say 3 - 4 months before flowering and still get same results as usual? (potency,yield,etc) Reason im askin is cuz i have some plants in the veg stage now (1 week, few days old) and im gonna be ordering more seeds next week. So the plants i have now will get a lil more veg time than the others (like 2 - 4 extra weeks *possibly)
Will this have any bad effects?

no just more yeld

plus you will be giving your ladies a chance to show sex with a longer veg time, since your new seeded plants you get will be shorter maybe you could do a stadium style grow to use your lighting to its best abbility

the only problem with doing this is your younger/saller plants will be farther away from your lights than the older/larger plants which in turn will decrease your production.you would be better off making a seperate flowering room or use two lights,one above the smaller plants,one above the larger ones

i might do the same thing but what you can do is if you have room just keep that first plant and clone it... fuck im washed i don't know what im saying...