Willow Myrtle Tree: Comprehensive Guide

by Australian Flowers

This article will guide you about the Willow Myrtle tree, its physical characteristics, where it is found and how to identify it. Read on if you want to learn more about the Willow Myrtle tree!

Description of Willow Myrtle

The tree is a beautiful, fast-growing tree native to Australia. It has long, slender green leaves on top and silver underneath. The flowers are white and appear in spring and summer. 

The fruit is a small, black berry that ripens in autumn. This plant has a unique physical appearance and is an excellent choice for gardens and landscapes.


The Myrtle tree falls under the scientific classification of Agonis flexuosa. It is a part of the family Myrtaceae and is native to Australia. 

Myrtaceae has about 150 species that are found in temperate and tropical regions all over the world.

Scientific Name

It’s scientific name is Agonis flexuosa. It is also known as peppermint willow, myrtle wattle and Australian willow, derived from the Latin word ‘flexuosus’ meaning ‘full of bends’.


Willow Myrtle Tree

Synonyms of flexuous myrtle include Myrtus, Agnus, flexuosa and Willow Myrtle.

The Myrtle tree is a beautiful evergreen perfect for any garden. It has a weeping habit and can grow up to 15 metres tall. The Myrtle tree is native to Australia and can be found in most parts of the country.

The leaves of the tree are long and slender, deep green. The flowers are small and white and appear in spring. The fruit is a small blackberry-like fruit that is edible.


The family of the Myrtle tree belongs is called “Myrtaceae”, and this family comprises about 150 genera with more than 6000 species distributed in the tropical and subtropical regions. The Myrtle tree is one of the species in this vast family.

Common Names

These are the shared names of the tree:

  • Willow myrtle
  • Willow myrtle tree
  • Agonis flexuosa 

Distribution and habitat

The trees are found in the southwest of Western Australia, from Shark Bay in the north to Augusta in the south. They grow in various habitats, including heathland, woodlands and forests. Heathland is a type of habitat that is characterized by low-growing shrubs and plants. The trees are often found growing in sandy soils in heathland habitats.

Woodland habitats are characterized by taller trees and a lower density of shrubs and plants. The myrtle trees often grow in woodland habitats near rivers and streams. These habitats are characterized by taller trees and a higher density of shrubs and plants. They often grow in forest habitats near rivers and streams.

CultivationWillow Myrtle Tree

The Myrtle tree is a striking evergreen shrub or tree from Southwestern Australia. It is an unusual-looking tree with a willow-like appearance and myrtle-like flowers, hence its name.

They are hardy plants that can tolerate various conditions, making them ideal for gardens in multiple climates. It can be grown as either a shrub or a tree, depending on how they are pruned. They usually reach a height of between 2 and 10 metres. They have a dense canopy of dark green leaves that are long and narrow, similar to those of a willow tree.

How to grow

To grow, start by planting the tree in a location with well-drained soil and total sun exposure. Water the tree regularly, providing about 1 inch of water per week. 

Fertilize every 6 to 8 weeks during the growing season with a balanced fertilizer. Prune the tree as needed to maintain its shape and size.


The Myrtle tree has many uses, both practical and decorative. The wood is solid and durable, making it ideal for construction and furniture-making. 

The leaves can be used as a natural dye, and the bark can be used to make a variety of medicines. The trees are also popular ornamental plants, often used in landscaping and gardens. This tree is an essential food source for many animals in Australia. Birds, bats, possums, and koalas all eat the leaves of the tree. The trees are also an essential nectar source for bees and other pollinators.

Frequently Asked Questions about this Tree

How do you grow agonis Flexuosa?

Agonis flexuosa is a Western Australian native shrub that grows between 2 and 4 metres. It has a dense, spreading habit with delicate, drooping foliage.
The flowers are white and sweetly scented, appearing in late winter or early spring. They are followed by pairs of papery seed pods that split open to release the seeds.
This shrub can be grown from either seed or cuttings. Seed can be sown in autumn or winter, while cuttings can be taken any time of year, provided they are newly-developed tips from healthy growth points.
Agonis flexuosa is ideally suited to areas with moist soils and good drainage. It prefers full sun.

How do you plant willow myrtle?

To plant willow myrtle, you must find a spot in your garden that gets plenty of sunlight. Dig a hole that is big enough to fit the tree’s root ball, and add some compost to the soil before planting. Carefully place the tree in the hole, ensure the roots are spread out evenly and fill in around the roots with more soil—water well after planting.

Is agonis Flexuosa fast-growing?

There isn’t a definitive answer to this question since growth rates can vary depending on the growing conditions. However, agonis flexuosa is considered a fast-growing plant and can often reach maturity within two years.

How big does agonis Flexuosa grow?

Agonis flexuosa is small to a medium-sized evergreen tree that typically grows to 6–12 m (20–39 ft) and has a width of 2.5–4 m (8.2–13.1 ft). It has an open, spreading crown with slender branches and reddish-brown bark that becomes rough and scaly with age.
The leaves are opposite, lanceolate to ovate, 5–15 cm (2.0–5.9 in) long and 2–6 cm (0.79–2.36 in) wide, green above and paler below, with a conspicuous midrib and several smaller veins radiating from it. The flowers are arranged.

Does the Willow myrtle tree have invasive roots?

Yes, the Willow myrtle tree can become invasive if not properly cared for. It proliferates and produces suckers from the base of the trunk and along the root system that can take over an area if not managed.
The best way to prevent this is to plant it in a large container where you can control its growth or bury it in an area where you are prepared to actively manage its spread by removing suckers as they appear.

Is Willow Myrtle native to Australia?

Yes, Willow Myrtle is native to Australia. It grows throughout the eastern and southern parts of the country in various habitats, including moist forests, rainforests, and riparian zones.
The willow myrtle is a small to medium-sized tree that typically reaches heights of 10-15 meters (33-49 feet). It has a slender trunk and spreading crown with narrow, pointed leaves. The fragrant white flowers are in dense spring and early summer clusters. The fruit is a small black berry containing one or two seeds.

How tall does a willow myrtle grow?

A willow myrtle typically grows around 15-25 feet tall, but in some cases, it can grow to be as tall as 30 feet. It has a slow growth rate and can take anywhere from 10-20 years to reach its full height.

What is special about the willow tree?

Willow trees are unique in that they can grow in complex environments. For example, willow trees can grow in areas with low soil or salt levels. Moreover, willow trees can thrive in flooded conditions and can even absorb water through their leaves. This makes them an ideal choice for planting along rivers and other waterways.
Willow trees also produce valuable resources. For example, the bark of a willow tree contains high levels of salicylic acid, the main ingredient in aspirin. Willow tree sap is also a natural source of rubber, and the wood can be used to make furniture, tools, and other objects.

What is the life cycle of a willow tree?

The life cycle of a willow tree is around 60-100 years.
In the first year, the seedling emerges from the ground and puts out a few leaves. It will grow taller and put out more leaves in the next few years. Once it’s about ten years old, the willow tree will start to grow branches and produce flowers. After the flowers are pollinated, they turn into berries that contain seeds. The berries are eaten by animals who spread the seeds in their droppings elsewhere, and a new willow tree begins to grow.

How do willow’s myrtle tree spread?

The willow’s myrtle tree grows by rooting suckers that extend from the roots of the parent tree. These suckers can be far from the parent tree and often start new trees. Cuttings also propagate the willow’s myrtle tree from young branches.

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