PlantFiles: Shooting Star Hoya
Hoya multiflora

My plant is quite happy in a north-facing window in the summer and in the winter gets a regular, store-bought "plant light". I water every four or five days because if I don't the leaves will yellow and drop. It doesn't seem to mind water in the dish, either. It regrows quickly after a pruning (all those dropped leaves...) and roots easily in water. It also flowers quite freely, though I haven't noticed a scent. Quite easy to care for, as long as you remember to water it, and looks lovely trained on a trellis or trailing.

For those growing this as a houseplant in the Pacific Northwest, I have noticed it thrives in a west/southwest-facing window.

Hoya multiflora, published 1823 by Blume in Catalogus. 49.
belongs to the Centrostemma group of Hoyas. Unofficially some place this species under the Genus of Centrostemma and not Hoya due to it's more or less shrubby growth and differing flowers.
Native to: China, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam.
Upright growth, often branching creating a shrubby look. Trim top if not branching. It is said that in the wild it has been seen growing vine like up trees.
Leaves are very thin and wavy around the edges.
Exudes thick milky white sap when cut or broken.
In general very easy to grow and flowers early on but is prone to "bud blast" if it dislikes growing conditions. May flower several times from same flower stem but also may throw it after the first blooms faded.
Use well draining soil and keep consistently moist (can keep pot in saucer of water), likes it warm and humid and doesn't tolerate cold drafts too well.
There are also variegated and spotted leaf forms available in the trade.

Info below is from "Flora Online, Flora of China":
Plants glabrous throughout except for corolla throat. Stems erect or decumbent, to 2.5 m tall, pale gray, yellowish when dry, with persistent leaf scars. Petiole 1-2 cm; leaf blade oblong-lanceolate, 8-18 × 2-6 cm, thick papery when dried, base cuneate, apex obtusely acuminate; lateral veins obscure. Inflorescences extra-axillary, subterminal, or terminal, hemispherical, many flowered; peduncle stout, 1.5-3 cm. Pedicel 3.5-7 cm. Sepals ovate, ca. 2.5 × 1.7 mm; glands many, linear. Corolla yellowish white with orange lobe apices, 1.6-1.8 cm, strongly reflexed from base; limb ca. 6 mm, throat white villous; lobes oblong-triangular, ca. 1.2 × 0.8 cm. Corona on distinct stalk; lobes yellow, narrowly lanceolate, 8-9 mm, outer angles extended into acuminate spurs, inner angles acuminate, higher than stigma head. Follicles linear-lanceolate in outline, 12-18 cm. Seeds ovate, ca. 4 × 2 mm; coma to 5 cm. Fl. May-Jul, fr. Sep-Dec.
Open forests, bushlands; 500-1200 m.

I keep the soil to both my Hoya Multiflora & H. Multiflora variagated moist or at times sitting in a little bit of water. Mine are kept as indoor plants (zone 5). I keep mine out of drafts from the ac/heat vents otherwise I have noticed it will blast the buds. When ever I've let the plant dry out it drops its buds and has on occasion gotten brown tips on the leaves. They both are constant bloomers and I have not noticed any fragrance in the blooms.

Hoya multiflora’s native range is from the Philippines to Indonesia and west to Peninsular Malaysia. It has been given many common names, the most used being 'Shooting Star’ Hoya. It is very different from other species of Hoya for its bushy upright habit. A shrubby plant with thin, succulent leaves and clusters of yellow and white waxy flowers resemble shooting stars. A great Hoya for those with small areas. Some H multiflora have silver flecked leaves. Give this plant bright filtered light and a minimum temperature of 60 degrees. Let dry between waterings.