Hoya pentaphlebia is another one of those Hoyas that is extremely susceptible to root rot when grown too cold and too wet. If given conditions to its liking it can flower early from cutting.  The plant like so many Hoyas thrives in warmth and high humidity, with good filtered light.  I grew my plant in my regular chunky mix, but struggled with it over two different winters.  The only reason I still have the plant is because of the gorgeous leaves.