PLANT CARE
LIGHT : Hoyas are best grown in bright indirect light. You run the risk of burning the foliage if placed in direct sun.
WATERING :I sure you allow your Hoya to become dry between watering. Overwatering will cause your Hoya to become waterlogged in which it will rot.
FEEDING : I recommend using thrive liquid ORCHID FOOD. Use fortnightly with your watering routine. This fertiliser is high in potash which is important for flower development.