It's spelled imperialis with an i. This one tends to get really big really fast and you better train it or it will take over your window. Try to bend it little by little and shape it the way you want it - or at least try! Once you bend it down it might send out a new vine at the top of the bend and then you just start over again. It took mine about 2 years to bloom.

Well since it is now way out of control....I cant bend it without breaking it. guess I cut it way back and start to train the new growths? Will it grow outside attached to a tree ,here in south Fla? Or is this to hard a hoya to grow? Does it need shade or sun? My other BIG flowered ones are in baskets that never get direct sun...facing north on my porch...and they are doing great! Is this like them? Bright light but no direct sun? I have those two expensive big red flowered hoyas..I know I am spelling them wrong, but like MacGillveryii and Megablaster? They grow great and have huge red flowers..but no aroma. I prefer my tiny Laconosas that smell up the porch so much at night and my 'Silver Pink' with its big red umbrel. but these huge flowers are cool to see!

Hi PoohBear,
At work , a couple of months ago , I planted 2 Hoya imperialis . I placed them several feet apart at the foot of a mature Banyan , ( Ficus tree ). The soil was lovely in that location , so I didn't amend it , just spread the natural leaf mulch back over the area.
The Hoyas took immediately to their new 'home' , and they are busy winding up the prop roots.
I planted them facing east. They get morning sun , which turns dappled , then shaded by afternoon. Of course the vines will 'choose their own light'.
These plants had been in the greenhouse , so they had gotten a little out of control. Imperialis does not have very obedient vines !!
They bloomed last winter , ( in the greenhouse ). The flowers are large and really showy and they take quite a while to develop, however I don't remember much in the way of fragrance , certainly not like lacunosa or compacta. Of course that could be my memory !!!
You are in zone 10. Why not plant yours in the ground and train it to go up a tree or over an arbour ? If you don't want it to 'disappear' up the tree , you could train the vines to go down , then back up again , maintaining the plant at a desired height. This is what some growers do with their vanilla orchids , to keep the flowers at a reasonable height , ( for hand pollinating ).

Florajilly