One of my plant seems to be "stuck". It just will not grow any more. It is only in the beginning stages, it is about 2 inches tall, and it has been the same height for about a week now (im positive its the same height because when I stoop down and look at the pot I can see it just peeking over the top of it, and its been in the exact same place) while my other plant is growing like wildfire. There has been some leaf development but not much. pH is good, its getting LOTS of light (like I said the other one is growing at top speed), what could be wrong? Ive heard that females grow more slowly than males so my other plant may be a male but it literally hasnt grown at all for a solid week.