This is my second plant of Hoya elliptica that has bloomed within six months of striking a cutting.  If you have a really warm, humid, bright location this plant should bloom in record time for you.  I grow this plant in the regular potting mix I use on all of my Hoyas and keep it on the damp side.  The strangest aspect of this plant is that it simply can not be trained.  Within days of the gentlest winding of a vine on to a trellis, the vine will die at the bend.