Lift that light to 1.5-2ft at least, don't over water her either, just as bad as under watering. They're a weed so as long as you get water and light right she will be happy
I seem to be seeing Herbie's in Heaps of forums so might be worth a try. I've wanted to try it for ages but been too paranoid. Sick of getting clones of clones of clones from an unknown strain.