Mj, that one you have is the same generation as the two 10 inchers that are still in the pot with Mama. I think it takes a while, they grow a tuber that gets bigger each year. That may be why Tropiflora charges $25 for their full size plants . .. . did you see LariAnn's culture tip above for setting the pot in a saucer of weak fertilizer water? I may separate the twins, and try that with one of them to see if it accelerates things. I'm thinking they're just slow growers, almost an unknown thing down here in the semi-tropics!
Never fear, they'll get there. Just be careful not to lose track of it when it disappears in the fall.
