Brush box

Sun

Full sun; tolerates partial shade, but develops its best crown in an open position.

Water

Water regularly while establishing. Established trees tolerate seasonal drought, though prolonged dry conditions can cause leaf shedding.

Soil

Adaptable to clay, loam and sandy soils with reasonable drainage; prefers deep, slightly acidic to neutral soil. Avoid persistently waterlogged ground.

Height

40-65 ft (12-20 m) in cultivation; can exceed 100 ft (30 m) in its native forests.

Spread

25-45 ft (7.5-14 m)

Flowers

Small white flowers with conspicuous clusters of stamens in late spring and summer.

Foliage

Evergreen. Glossy, leathery, dark green oval leaves clustered near the ends of branches; the dense canopy provides year-round shade.

Growth

Moderate to fast in warm conditions with adequate moisture.

Care needed

Medium

• Pollinators
• Drought tolerant
• Heat tolerant
• Wildlife

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Hard

Toughness

Needs looking after

Pick your zone, country, light and whether you have pets.

1. Planting day

   7 ft (2 m)

2. After 1 year

   9 ft (2.9 m)

3. After 2 years

   12 ft (3.8 m)

4. After 3 years

   15 ft (4.6 m)

5. After 5 years

   21 ft (6.4 m)

About 16 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Native to

Australia

Growth rate

Fast

• Choose a permanent position well away from buildings, drains, overhead wires and paved surfaces.
• Water deeply through the first two summers, allowing the surface soil to dry between waterings.
• Spread a 2-3 in (5-8 cm) layer of organic mulch over the root zone, keeping it clear of the trunk.
• Feed young trees lightly in spring only if growth is poor; established trees rarely need routine fertiliser.
• Stake only if the root ball is unstable, use flexible ties, and remove supports once the tree is firmly rooted.
• Protect young trees from frost and cold, drying winds.

Pruning. Train young trees in late winter or early spring, after the worst frost risk, retaining a sound main framework and removing rubbing or badly placed branches. Avoid topping; have a qualified arborist assess large limbs and mature trees.

Spring

Plant after frost danger has passed and water the root ball and surrounding soil thoroughly.

Spring

Check young trees for competing leaders, rubbing branches and tight staking ties.

Summer

Water establishing trees deeply during dry spells rather than giving frequent light sprinklings.

Autumn

Replenish mulch and remove accumulated leaves and woody capsules from paths and drains.

Winter

Protect recently planted trees if frost is forecast and inspect established trees after storms.

• Use as a broad shade tree in a large lawn, with enough room for its mature crown and roots.
• Plant in spacious Australian-native gardens above lomandra and flax lilies.
• Use repeated trees along a wide driveway or boundary where roots will not conflict with paving or services.
• Create a sheltered woodland setting with shade-tolerant planting beneath the outer canopy.

Garden styles it suits: Australian native, Urban city garden, Woodland, Grand estate, Coastal and Green on green.

Plant it with: Lomandra, Blue flax lily, Clivia and Cast-iron plant.

Wildlife: Flowers attract bees and other insects. The dense canopy provides shelter and potential nesting sites for birds.

• Frost damage: young foliage and shoots can blacken in cold weather; protect young trees and wait until spring growth resumes before removing damaged wood.
• Root and paving conflicts: vigorous roots can lift nearby hard surfaces; prevent problems through generous siting rather than cutting major roots.
• Scale insects and sooty mould: inspect affected foliage, encourage beneficial insects and treat reachable infestations with a labelled horticultural oil when needed.
• Root decline in saturated soil: improve drainage before planting and avoid frequent irrigation once the tree is established.

Not known to be toxic to people, cats, dogs or horses. Species-specific safety information is limited, so do not treat the leaves, bark, flowers or woody capsules as edible or offer them as livestock feed.

Where it spreads. Has naturalised outside Australia, including parts of New Zealand and South Africa. Check local weed guidance before planting near native vegetation; naturalisation does not necessarily mean it is locally listed as invasive.

• Swamp box (Lophostemon suaveolens)

  Usually has opposite leaves and rough, fibrous bark extending farther up the trunk and branches; brush box has leaves crowded near branch tips and conspicuously smooth upper bark.

• Turpentine tree (Syncarpia glomulifera)

  Has rough, fibrous bark extending onto the branches, leaves in opposite pairs that can appear in groups of four, and woody fruit joined into clusters rather than separate brush-box capsules.

Lophostemon comes from Greek words referring to the crested arrangement of the stamens, while confertus means crowded, referring to the clustered leaves.

Propagation. Usually grown from seed collected from mature woody capsules. Surface-sow on a fine, free-draining seed mix, cover very lightly, and keep warm and evenly moist.

Accepted botanical name

Lophostemon confertus

In the US and Canada

Introduced in Hawaii.

Native range

New South Wales and Queensland.

Measured

Average height 1415 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.