Can i?

start flowering my sativa anytime i want?

yes...............

how much do you think i would get from 3 small sativas i start to flower after about 2 weeks green?

How old are these plants and how many nodes do they have?

right now they are sprouts but when they enter the vegig stage im going to veg for 2-3 weeks then try to budd

Anytime your heart desires.

Yield will small. Do you have space constrictions?

not to bad of a space constriction more like a time constriction i have about 9 weeks left to get done with budding and right now i have some 1inch sprouts should i even try?

maybe the bloom will delay if ya proceed to 12/12 @ 3 weeks, coz the plants are grown from seeds and they are not mature enough to begin the process

hmmm well i got nine weeks what should i do

9 weeks for veg and bloom....can't happen! sativas can take 12-14 weeks to finish! rememba!

well im going to try the only reason i cant is because i can grow when my g ma moves in but its going to be in a grow box with a lock on it in the backyard shed she will barley goes in the shed so you think i can keep it hiddin from her for a while?

hahaha...i dun kno man....u tell me

do you think i get atleast 2 ounces from 4 small plants?

The only thing i could suggest is to have it in your room and have a lock on that.. This way your not rushing your plants.. Rushing them gives you a much smaller yeald and weaker smoke... you may get 2 ounce but it might not be strong stuff...

Im not trying to be a twat but please dont rush..