Hoya is an evergreen vine with shoots 3.2 ft. (1m) long and slightly succulent, dark green leaves.
The plant bears groups of 12-20 waxy-looking, star-shaped, umbellate flowers. They are white, sometimes tinted with pink, with a central eye. When it’s hot they exude honey-sweet nectar and have a strong fragrance. Each blossom lasts for weeks. The most important species is H.carnosa, which also has a Variegata form.
H.bella is more dainty and pendulant. It cascades well and thrives in orchid baskets.
Other species are H. lacunosa, a spring bloomer. And H. multiflora, with greenish yellow flowers.
Location: In summer light and warm; in winter at only 54-59° F (12-15°C), to promote flowering.
Care: Keep evenly and lightly moist; spray often. After mid autumn, cut back on water, but the root ball should not be dry in its cool winter position. Feed biweekly during growth. Repot older plants if needed in standard soil mix with drainage, using pots just a little larger. Once buds appear, don’t move hoya, to prevent the buds from falling. Provide support for climbing.
Propagation: In spring by tip or stem cuttings with bottom heating. Rooting takes six to eight weeks.
Pests and Diseases: Scale insects, aphids, or spider mites if too warm in winter; leaves fall if roots are soggy.
Uses: Climbing or hanging plants for light rooms. Good for hydroponics.