Hoya Species, Australian Waxflower, Wax Plant, Porcelain Flower

Hoya australis

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Hoya (HOY-a) (Info)
Species: australis (aw-STRAL-iss) (Info)
Synonym:Hoya bicarinata
Synonym:Hoya pilosa
Synonym:Hoya pubescens


Tropicals and Tender Perennials

Vines and Climbers

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Sun to Partial Shade




Foliage Color:

Unknown - Tell us


15-20 ft. (4.7-6 m)


3-6 in. (7-15 cm)


USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Where to Grow:

Suitable for growing in containers


Parts of plant are poisonous if ingested

Bloom Color:


White/Near White


Bloom Characteristics:

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Summer/Early Fall

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From softwood cuttings

Seed Collecting:

Bag seedheads to capture ripening seed

Allow pods to dry on plant; break open to collect seeds

Seed does not store well; sow as soon as possible


This plant is said to grow outdoors in the following regions:

Miami, Florida

Palm Bay, Florida


Kurtistown, Hawaii

Dennis Port, Massachusetts

Gardeners' Notes:


On May 12, 2016, kkurman from West Tisbury, MA wrote:

I have a question: does any one know the species with deep violet marbling in the foliage? it shows mostly on the reverse, actually the veins are green the tissue between is violet and opaque so it shows when backlit... I don't know how to post a pic here but if anyone has an idea about it id appreciate it thanks


On Apr 17, 2016, smileclick from Sydney,
Australia wrote:

I saw one of these Hoyas in flower at the Royal Botanic Garden, Sydney today (mid autumn), photo attached. It was growing under branches of a low tree, and had a draping habit. The vines would be about 4 metres/12' long, and there were large gaps between leaves. The flowers were beautiful half spheres, and had a strong fragrance, the same as my commonly grown indoor plant, dracaena fragrans' flowers - a strong, sweet almond fragrance. Both plants' fragrance would be overpowering indoors - I needed to cut down sections of my dracaena fragrans flower spikes to reduce the fragrance's potentcy, but it would be a shame to do the same with this Hoya.
When not in flower, the variety of Hoya australis I have and at the botanic gardens look very plain in my opinion.


On Nov 1, 2009, plantladylin from (Zone 1) wrote:

I have two different Hoya australis plants and could never remember which was which, until I learned from a very knowledgeable person here on the DG Hoya Forum how to distinguish one from the other. This plant, Hoya australis ssp. australis, has pubescent leaves (soft tiny hairs). To me, the underside of the leaves feel even softer and fuzzier than the top. My plant is small and hasn't bloomed yet, but I look forward to seeing signs of peduncles, buds, and especially those beautiful fragrant blooms!


On Sep 9, 2007, palmbob from Acton, CA (Zone 8b) wrote:

This is one of the more arid tolerant species, needing very little humidity in its care (unlike the majority of species which prefer some humidity). It is one of the more ideal Hoyas for those with cactus collections who want a Hoya in their succulent cold frames.


On Dec 7, 2005, Hoyamoyen from Aarschot,
Belgium (Zone 3a) wrote:

There are more than one subspecies of this Hoya.


On Dec 15, 2002, ideboda from T-village ;) - Friesland,
Netherlands (Zone 6a) wrote:

Plant originates from the east of Australia (Queensland, New South Wales), where it lives in rainforests. It is the most common Hoya of the 7 species occurring in Australia.
(The genus Hoya contains about 200 different species).
It can be grown in subtropical and tropical gardens; for colder climates it is more suitable as a houseplant.
It needs a support for its long vines, it forms stems that can be several metres long.
The milky juice in the stems is poisonous.
The fragrant waxy flowers, growing in umbels, attract insects. When growing indoors, green aphids may attack and spoil the flowers (the same as with other Hoya species).
Cuttings with a few leaves root easily in potting-soil.
The name Hoya... read more