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How to Grow Hoya–Wax Plant

Hoya carnosa, also called Porcelain flower or wax plant.

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
Hoya carnosa variegata 'Krimson Queen'
Hoya carnosa variegata ‘Krimson Queen’

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.

Hoya Care

  • 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.

Hoya Propagation

  • 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.

One Comment

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  1. 1/ How do I plant apple seed by seed that has already shot in my Apple. What sort of soil do I plant it in in a pot.
    2/ How do I take a piece of Hoya to grow.
    I live in Capel , Western Australia.

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