I have restarted Hoya leucantha many times in the relatively short time that I have had it. Three times I have had 3 foot tall specimen plants that looked wonderful, but soon fell to one malady, or another. My latest iteration of this plant is as a hanging basket which is hanging in a kitchen window with no artificial aids and very little light. This plant managed to pull off a blooming feat that few other Hoyas could do; it flowered at the winter solstice in late December. Here is a not so great photo of this small miracle: