Well its got some color but hasnt really grown yet. Thinking about clipping a nub off to spark some growth maybe...
I have never seen clipping to cause a tiny piece to grow. In my experience its all about acclimating to your tanks perimeters, then it bases out and then up. If its not doing anything I would test par and add flow. Par too high(over 400ish) lower it, par too low(under 150) I would raise it. Is slipping something others have had success with?