Leptospermum 'Pacific Beauty'

(cultivar)

Family: Myrtaceae

A small to large shrub growing to 2 metres tall by 3 metres wide.

It is formally described as Leptospermum polygalifolium subsp. tropicum (syn: L. flavescens) and is reported to be from a natural population on the east coast of Hinchinbrook Island (northern Queensland).

Most Leptospermum species are endemic to Australia where most are found in southern areas of the country and many make desirable garden plants. Current estimates recognize about ninety species of Leptospermum along with many cultivars now existing.

The leaves are narrow-elliptic / to linear elliptic, to 20 mm long by 2 mm wide, usually hairless (glabrous) and with obvious oil dots, light to mid to grey-green, often smelling like lemon when crushed.

Leptospermum typically produce solitary flowers, or in small groups of 2s and 3s or more, within the leaf axils. Flowers have 5 petals and sepals and have a symmetrical rotate shape.  Stamens are produced in groups of 5 which surround 1 carpel (female part). The prominent feature in Leptospermum is the hypanthium, a cup or vase-shaped receptacle that supports the flower.

In this cultivar, the flowers are produced solitarily, to 20 mm in diameter or more, white in colour, occurring from August to October. The flower buds are pink which adds to its appeal. It can flower very heavily.

The fruit (capsules) are to 10 mm in diameter, woody, persisting after seed release.

In the garden

This cultivar has been popular in the past and may be marketed under the name L. flavescens ‘Pacific Beauty’. It is formally described as Leptospermum polygalifolium subsp. tropicum.

It is a very hardy shrub. It grows readily in a sandy, free-draining soil but will also tolerate a heavier soil, and will benefit from some enrichment, in full sun to part shade. It may not thrive in boggy soils.

It comes from northern Queensland and so is a great plant for tropical gardens but also grows well in cooler climates. There are reports that young plants can be killed by frost but adults are more frost-hardy.

Can be pruned to create a dense plant. Some plants will flower very heavily, creating a stunning show, so place in an area where it can be admired.

It makes a good screening plant and is recommended for rockeries.  

Leptospermum are generally susceptible to the webbing caterpillar. Usually, the most effective control method for this pest is removing infestations by hand or, if necessary, you can systematically spray with a suitable pesticide. They are also prone to scale insects which is best treated by spraying white oil solution.

Propagation

Must be propagated from cuttings to maintain form and characteristics.

Other information

Most Leptospermum species are endemic to Australia where most are found in southern areas of the country and many make desirable garden plants. Current estimates recognize about ninety species of Leptospermum along with many cultivars now existing.

The nectar from the flowers of one species (L. scoparium) is harvested by bees, yielding honey, which is marketed as Manuka honey.

Many Leptospermum species have an ability to regenerate vegetatively after fire with suckering basal growth and branch-shoots. They will also regenerate by seed.

The general common name, Teatree, derives from the practice of early Australian settlers who soaked the leaves of several species in boiling water to make a herbal tea.

Leptospermumderived from the Greek words leptos meaning “fine” or “slender” and sperma which means “seed” referring to the thin brown seeds of the genus.

‘Pacific Beauty’named for the natural population where it was selected, on the east coast of Hinchinbrook Island.  

Australian National Botanic Gardens – Leptospermum profile page https://www.anbg.gov.au/leptospermum/

Australian National Botanic Gardens – Leptospermum polygalifolium profile page

https://www.anbg.gov.au/leptospermum/leptospermum-polygal.html  

Australian National Botanic Gardens – Leptospermum ‘Pacific Beauty’

https://www.anbg.gov.au/acra/descriptions/acc420.html  

Wrigley, J.W. & Fagg, M.I. (2001). Australian Native Plants – Propagation, cultivation and use in landscaping. 4th edition. New Holland Publishers, Pty. Ltd. Australia.

By Dan Clarke