jesus who cares if she's a girl or she's 23 or whatever
the title of this thread should be "growing pot is easy, if you have the proper lighting"
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if she wanted to save the plant she could by topping it way back down to the bottom (in other words cut it down to 6" or so tall) and going to wally world and grabbing one of those four packs of 23 watt CFL's for 7 bucks.
to sandstorm or whatever your name is you can save the plant and grow some decent bud, and you haven't completely wasted your time, the plant has a sturdy stem and well established roots i'm sure.
1) top the plant to about 6" or so, right above a set of leaves.
2) go to walmart and buy 4 x 23 watt CFL light bulbs (compact fluorescent lights, the energy efficient kind that look like little spirals) for 7 dollars, they come in a green box.
3) get some lamps and arrange them around the plant so the lights are around 3-4" away from the leaves.
4) run the lights for about 2-3 weeks for 18+ hours a day (most just leave it on 24/7) and let the plant bush out a little on the bottom, with adequate light cannabis is a very bushy plant, not tall and thin like yours.
5) get an electrical timer (4 bucks at walmart) and set your lights to run for 12 hours a day (it is important that it is in total darkness for the 12 hours the light is off so stick it in ur closet and keep the door closed at night.
6) after you make the switch to 12 hours light/12 hours dark the sex of the plant will show in 2 or 3 weeks, there are instructions on here to figure out if you have a male or female (it's pretty easy to figure out), then you've got about 5-7 more weeks of flowering and you should be able to get an eigth or a quarter off of it and if you harvest and cure it well it'll be some good smoke (assuming it ends up being a female)
or you could just skip step 1, and instead re-plant and start over steps 2-6.
edit, i read you are already on 12/12 everything still applies except i wouldn't top at this point if you've already started flowering. you really need to increase your light output or when the plant starts flowering (which requires FAR more energy than vegetative growth). i think the one thing you didn't really understand is that your plants extreme height is actually a natural adaptation for a plant that isn't getting adequate light. for example let's say the plant was growing in the wild but a lot of the light was blocked by some bushes, the plants natural response is to grow taller to get direct access to the light, which in your case is rather extreme as that is a very stretched out plant.