Many species of Hoya are popular houseplants in temperate areas (especially H. carnosa), grown for their attractive foliage and strongly scented flowers. Numerous cultivars have been selected for different leaf forms or flower colours. Hoyas grow well indoors, preferring bright light, but will tolerate fairly low light levels, although they may not flower without bright light. Hoyas commonly sold in nurseries as houseplants include cultivars of H. carnosa (Krimson Queen, Hindu Rope − compacta), H. pubicalyx (often mislabelled as H. carnosa or H. purpurea-fusca), and H. kerrii. Hoyas are easy to propagate, and are commonly sold as cuttings, either rooted or unrooted, or as a potted plant.
Hoya carnosa has been shown in recent studies at the University of Georgia to be an excellent remover of pollutants in the indoor environment.[citation needed]
Various cultures have used hoyas medicinally, especially Polynesian cultures.[citation needed] Some are toxic to livestock and sheep poisonings in Australia are reported.[citation needed]
Several Hoya species and cultivars are excellent terrarium plants.
Hoya campanulata
Hoya cinnamomifolia
Hoya imperialis
Hoya parasitica
Hoya pottsii
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