This is my method, and it seems to work well for me: I place the gibba on top of pure peat in an undrained container, and keep the container filled to a couple of cm above the plant with water, allowing it to dry off to just wet, and repeat. After the stolons attach into the peat, and the plant is growing well, I submerge the whole thing in a plastic dishpan filled with rainwater, with a sheet of white plastic on the surface. Mine is outdoors partially under the leaves of a daylilly, where it gets several hours of direct sun. It's going wild. I haven't overwintered it yet, but will try this year to allow it to freeze solid.