The information in the following paragraph was taken from Wikipedia.
You will find much more information about the species at this site, entitled "The Hoya Page."
This photo was taken January 24, 2010.
The Hoya has waxy leaves, and is susceptible to mealy bugs, and certain varieties to spider mites. Treat both by spraying with an insecticidal soap.
Hoyas like bright, indirect sunlight. These plants make great houseplants. I have mine in a bright, west window. You might have to move it around until it finds the "perfect spot."
They tolerate humidity at low levels. If you allow the soil to completely dry between waterings, you will not have to worry about overwatering. When you do water, make sure you water thoroughly - until some water drains through the pot.
You can fertizilize lightly. Once-a-month with a balanced fertilizer is adequate. During the winter, when the plant rests, discontinue feeding.
You can prune when you need to, or after the flowering cycle is complete. The plant blooms on new growth.
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