The hoya houseplant offers ease of growth and requires only minimal care. The plant grows well in hanging baskets where its vinelike stems can dangle freely or on small trellises. Each summer the plant produces fragrant pink and white flowers in abundance. It is estimated that about 100 species of hoya plants flourish in parts of Asia and Australia. The Hoya carnosa, known as the wax plant, is commonly grown as a houseplant
Place the hoya plant in a bright east- or west-facing window where it will receive at least six hours of sunlight per day. The hoya will produce more abundant flowers if placed in a south-facing window but should be moved once flowering has ceased. The plant can grow in lower light situations but will not blossom. Never move the plant to a new location once buds have begun to form or the plant may drop them.
Keep the soil moist around the hoya plant during the spring, summer and fall. Allow the soil to dry out between waterings during the winter. The hoya does not require high humidity to thrive and will easily live in the humidity found in most homes.
Hoya plants cannot live in temperatures that dip below 40 degrees F. The hoya grows best in normal house temperatures of 60 to 75 degrees F.
Flowering begins when the hoya reaches 4 years of age. Never remove the hoya flowers since flowers are produced on the same stems year after year. Even removal of spent flowers will damage the flowering ability of the plant for the following year.
Fertilize the hoya plant monthly during spring and summer. Use a liquid fertilizer that is high in potassium. Mix the fertilizer at half strength and apply.
Re-pot the hoya every few years when it becomes severely root-bound. Choose a pot that is one size larger with holes in the bottom to allow the water to drain freely. Use a potting soil with ample organic matter and very little sand when re-potting.