monster plants!!!

alright so ive been reading threads on this website everyday for about 3 months and ive learned alot. so in mid june i germinated seeds from a schwag bag,probably mexican sativa.also im in sunny so cal. well they have been growing at an astronomical height. i started with 5 and 2 were male and now i have 3 females. its sept 17 and they are all in preflower. they have also streched alot in like the past two weeks. im using mg bloom booster, i know it sucks but im gonna go get ff beastie blooms next week. i have a few questions.

will they be done by mid november???
when will they start to bud???
guestimate on what my yield will be???
one plant has purple leaf stems and leaf tips are curling,why is this???
how tall will they be when finished???

that looks really risky so close to your driveway like that yo...lol don'tcha think

its not by the drive way its in my backyard

HAHA i didnt see any drive way either.. ok i wanna smoke the shit u be smokin or else u have a weird drive way ive never seen

looks good!
the purple stems is rather normal from what I have seen. the leaves are probably curling up because they are trying to retain moisture.
try watering.
the other questions cannot be answered because it depends on the strain, which is unknown.

If you are in So Cal it probably is a equatorial sativa. I will presume if it had seeds, it was an outdoor operation. Don't know much about he Mexican grows except what is on TV. That said, it looks pretty sativa-ish. Depending on a lot of things, these can bloom for 12-16 weeks or more, after first showing pistils. We used to get a couple pounds per plant with a true sativa , but it would take forever to ripen. Good luck with the girls.

16 weeks to ripen damn, i might be screwed than cause that will be in december wont the frost at night kill them???

i thought that last pic and first pic had a driveway in the background...but it was blackish wood or something else or another