Never cut the bare spurs the flowers hang from; next year's clusters come from the same ones. Bright light and a slightly root-bound pot encourage blooms.
The wax plant earns its name from thick, semi-succulent leaves and clusters of star-shaped, almost porcelain flowers that smell sweet in the evening. It's an easy, slow-growing trailer that blooms once it's settled, mature, and getting enough light.
Two rules unlock the flowers. First, give it bright light - a few hours near a sunny window. Second, don't cut off the flower stalks (the spurs): hoyas rebloom from the same peduncles year after year, so removing them removes next season's blooms. Treat it like a succulent on watering and it asks for very little else.
Bright indirect light, with a little direct sun, encourages the waxy flowers; too dim and it won't bloom.
Let the soil dry well, then soak
Feed with a high-potassium feed to support blooming
Never remove the flower spurs - it reblooms from them
No flowers usually means not enough light
Check leaf joints for mealybugs