Hoya carnosa does best in at least 4 hours of direct sunlight a day, but also can be grown in bright indirect or curtain-filtered sunlight. Night temperatures of 60F to 65F and day temperatures of 70F or higher are optimal. Water freely during flowering but allow the soil to become almost dry between waterings when the plants are resting. Fertilize every 2 months in spring and summer. Do not remove the leafless spurs or stubs, on which new flowers appear every year.