Hoya is a shrubby or climbing tropical plant that has been a houseplant favorite for many years. It is typically trained on a trellis or up strings. It can also spill from a hanging basket.
Both the leaves and flowers of Hoya have a waxy appearance. The glazed look of the star-shaped white blooms which appear in tight clusters gives the plant its common names, porcelain flower and wax plant.
Get to Know Hoya
- Plant type: Tropical perennial
- Growing Zones and range:
- Hardiness: Grows best at about 70°F (21°C), night temperature 55° to 60°F (13°-16°C)
- Height and width:
- Foliage: Waxy thick leaves; leaf shapes and colors vary
- Flowers: Star-shaped white flowers appear in tight clusters are sweetly fragrant.
- Bloom time: Summer
- Uses: Houseplant
- Botanical name: Hoya
- Common name: Wax plant, porcelain flower
Where to Plant Hoya
- Grow Hoya in strong reflected light, not direct sunlight.
- Plant Hoya in indoor potting soil.
How to Water and Feed Hoya
- Water Hoya evenly; allow the soil to dry out a bit between waterings.
- Hoya needs slightly higher than average humidity; mist plants daily.
- Fertilize Hoya with an all-purpose indoor plant food every two months; do not fertilize in winter during the rest period.
- Mature plants prefer to be potbound. Hoya blooms best with potbound. Repot young plants each year after the rest period.
- Carefully remove faded blooms leaving woody spur extending from leaf axil intact; from these spurs, new blooms will emerge.
- Let plant rest from fall through winter; it becomes semi-dormant. Set in a cool spot, 50°F (10°C); give just enough water to keep soil from drying out; withhold fertilizer.
- Hoya can be attacked by aphids, mealybugs, mites, root rot, and scale.
- Propagate by layering or stem cuttings.
Hoya Varieties to Grow
- H. australis has greenish-white flowers with red bases and white crowns.
- H. bella, miniature wax plant, is a dwarf best grown in a basket; white flowers with crimson centers.
- H. carnosa, honey plant, has pinkish-white flowers with red crowns; the leaves of one cultivar twist and curl, and thus the plant is called Hindu rope plant.
- H. imperialis has purple blooms with ivory crowns.