Scientific Name
Hoya obscura Elmer ex C.M.Burton
Common Name(s)
Red Wax Plant, Porcelain Flower
Synonym(s)
Hoya obscura subsp. obscura
Scientific Classification
Family: Apocynaceae
Subfamily: Asclepiadoideae
Tribe: Marsdenieae
Genus: Hoya
Description
Hoya obscura is a fast-growing vining plant with long, branching stems and veined, nearly elliptical leaves ranging from deep green when grown in the shade to deep reddish in bright sunlight. The stems are green, becoming dull yellow as they age. They are branched, woody at the base, winged at the tip, and can grow up to 6.6 feet (2 M0 long and 0.3 inches (0.8 cm) in diameter. The leaves are up to 4 inches (10 cm) long, up to 1.6 inches (4 cm) wide, and attached to the stem by up to 0.6 inches (1.5 cm) long petiole.
The fragrant flowers are salmon pink and appear in clusters, usually in spring and summer. The clusters are up to 2 inches (5 cm) in diameter, each with 20 to 30 flowers. The linear seed pods are up to 3.2 inches (8 cm) long.
Origin
Hoya obscura is native to Philippines. It was first collected by Adolph Daniel Edward Elmer (1870-1942) in 1916 at Mount Bulusan in the province of Sorsogon on the island of Luzon but can be found throughout the Philippines.
Hardiness
USDA hardiness zones 10b to 11b: from 35 °F (+1.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Hoyas don't ask for much beyond the well-draining soil and the warm, humid conditions many tropical flowers crave. They don't like wet feet or heavy soil, and as many grow as epiphytes in nature. Give them at least a half-day of sunshine, and bring them indoors when temperatures drop below 50 °F (10 °C).
Hoya finishes blooming, leave the flower stalk, as it may produce new flowers. Removing the stalk forces the plant to produce a new stalk, which delays blooming and wastes the plant's energy. They are light feeders, and a monthly drink of compost tea or dilute fish emulsion provides all the nutrition these tropicals need. Hoyas like the security of a snug pot, and plants that are a bit root-bound will flower more prolifically than those swimming around in a giant pot.
Propagate Hoyas by cuttings of top growth or by leaf cuttings. The average cutting or leaf start will produce a blooming plant in 2 years or less. The easiest method of propagation is by layering.
See more at How to Grow and Care for Hoya.
Hybrids
Links
- Back to genus Hoya
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
Photo Gallery
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