Right, that thing flowered for ages! Has yours shown signs of flower, and when was it? I'd say don't give up on her, she'll stretch for a long time and a lot once she matures. Keep in mind I am in DWC so you can't quite compare my time line to yours as mine would be much quicker in water vs dirt. Maybe it's just the LED causing it to look dark, if no other symptoms are showing I wouldn't worry, sometimes I have leaves looking darker than normal but it never comes of anything. Put as much light as you can on her, light is really the biggest factor you can use to influence your size. Throw some CFL's or anything in there and let her keep going.