Hoyas (Hoya carnosa), also called wax plants, can get by for years indoors, but you'll a have healthier plant that blooms better when you give your hoya an annual summer vacation. Hoyas are long-lived plants that can grow outdoors year-round in U.S. Department of Agriculture plant hardiness zones 10 and 11, but in most areas of the country, hoyas are houseplants. Just like when you move vegetable and annual seedlings outdoors in spring, you need to get your hoya used to its new environment slowly to keep the tender succulent vine growing and the summer-blooming, pink flowers coming. Watch the plant's development. Hoyas are temperamental. If you move the plant after it has set buds, they are likely to drop and you will lose any flowers for this year.
Move your hoya to a cooler, brighter area indoors when nighttime temperatures are consistently above 50 degrees Fahrenheit.
Place the hoya and its support structure in a shady area that is protected from wind, like under the eaves of a porch or pergola or a shaded area near a wall or board fence.
Leave the plant in the shade for 10 to 14 days until it becomes used to the increased light, lower temperatures, and increased humidity and air circulation.
Move the plant back indoors to if the nighttime temperature threatens to drop below 50 F.
Move the plant to an area that is partly shady, with from four to six hours of sun -- preferably in the morning or late afternoon -- each day. A hoya plant won't set buds when it grows in full shade.
Check the soil frequently and water when the top 1 inch of soil is dry. Your hoya will dry out sooner than it did indoors.