Propagating Curcuma roscoeana
Does anyone know the secret for getting C. roscoeana to multiply? I've had no trouble with any of the other Curcumas, usually the rhizomes produce multiple branches or offsets, but Roscoeana seems to give only one, or at most two, and then when the parent rhizome dies back, you're no further ahead than you were to begin with. I thought maybe I could get seeds, but none of the clones I have seem to produce or take pollen. We keep bringing them in from Thailand, but I'd like to be able to increase the ones we have.