Hoyas

Hoyas, or Hoya spp., are a genus of flowering plants in the family Apocynaceae. They include about 200 to 300 species and are commonly known as wax plants or porcelain flowers. Hoyas are mostly tropical plants that grow as evergreen climbers, lianas, or perennials. They are native to tropical Asia, Australia, and the Pacific Islands and are often epiphytic, attaching to trees with aerial roots.

The plants have thick, succulent leaves and produce umbels of star-shaped flowers with a waxy, wax-like appearance. The flowers are typically fragrant and come in a range of colors, including white, pink, purple, red, and combinations, depending on the species. The bloom structure and glossy foliage make them popular as houseplants and greenhouse subjects.

In cultivation, Hoyas are valued for their relatively easy care and long-lasting flowers. They prefer bright, indirect light and a well-draining, porous potting mix. Watering should be moderate, allowing the soil to dry somewhat between waterings to prevent root rot. Many species tolerate holiday neglect and dry air but generally respond well to higher humidity and warmer temperatures. They can be grown as hanging plants or trained to climb with support.

Propagation is commonly done through stem cuttings, which root readily in a well-draining medium; air layering is another method for larger plants. Hoyas have a milky sap and, like many members of their family, can be toxic if ingested; handling plant material may cause irritation in sensitive individuals, so keep them away from pets and small children.

Notable species include Hoya carnosa, Hoya kerrii, and Hoya australis, among others, and cultivars vary widely in leaf shape, color, and flower form.