Hoya australis
Hoya australis
Hoya australis, also called Waxvine or Honey Plant, is a sturdy climbing vine with thick, glossy deep-green leaves. It can produce clusters of star-shaped, porcelain-white flowers with crimson centers and a spicy-sweet scent, especially in the evening. It grows faster than many Hoyas and works well on an indoor trellis or in a hanging basket.
Light
Bright Indirect
Water
Moderate
Difficulty
Easy
Humidity
Moderate
Pet Friendly
Hoya australis is non-toxic to cats, dogs, and horses. However, the milky sap may cause mild skin irritation for humans with latex sensitivities.
Care Notes
Light
Give your Hoya australis bright, indirect light. Filtered sun for much of the day helps it bloom. Gentle morning sun is usually fine; hot afternoon sun can scorch the thick leaves.
Water
Let the top half to three-quarters of the mix dry before you water thoroughly. Soak the planter, then let every bit of excess drain away. This plant handles short dry spells better than soggy roots.
Soil
Use a chunky, airy mix (orchid bark, perlite, and a bit of potting soil or coco coir). Hoyas like being a little root-bound, so skip frequent repotting. Always choose a pot with drainage holes.
Humidity and Temperature
Aim for 65°F to 80°F (18°C to 27°C). Average home humidity works; growth often picks up above 50%. Keep the plant clear of cold drafts and heating vents.
Common Issues
Yellow, soft leaves usually mean overwatering or poor drainage. Wrinkled leaves point to underwatering. Leave the peduncles in place after blooms fade so the plant can flower from the same stalks again.
In-Depth Care & Growth
Feeding & Soil
Fertilizer
Balanced liquid houseplant fertilizer
Soil
Chunky, epiphytic mix including orchid bark and perlite
Physical Attributes
Mature Size
Vines can reach 10 to 20 feet in length indoors
Growth Rate
Fast
Propagation
Stem cuttings with at least two nodes rooted in water, perlite, or sphagnum moss
Common Varieties
Hoya australis 'Lisa' (variegated)
Thick, rounded leaves with creamy yellow and light green centers edged in deep green. New growth often shows a soft pink flush.
Hoya australis ssp. tenuipes
This subspecies has glossy, bright green, hairless leaves with an elongated oval shape and a smooth, waxy feel.
Hoya australis ssp. rupicola
This subspecies has especially thick, succulent leaves with a matte, velvety texture. In strong light, the foliage can take on bronze or reddish tones.