Eucalyptus spathulata – Swamp Mallet - Evergreen Trees Direct

Eucalyptus spathulata – Swamp Mallet

$280.00

Tax included. Shipping calculated at checkout.

Size: 40cm/45L

40cm/45L

Current Stock Height Guides

40cm/45L: 0.8m – 1.3m Approx.

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you mustconfirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Mature Height & Width

Mature Height: 6m to 10m

Mature Width: 4m to 6m

Eucalyptus spathulata – Swamp Mallet is expected to grow 50cm to 100cm per year (fast).

Root Ball Dimensions

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

30cm Pot: 33cm (W) × 30cm (D)
40cm/45L Pot: 44cm (W) × 41.5cm (D)
50cm Pot / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (D)
150L Bag: 66cm (W) × 55cm (D)
200L Bag: 71.5cm (W) × 60.5cm (D)
300L Bag: 88cm (W) × 63.8cm (D)
400L Bag: 99cm (W) × 66cm (D)
500L Bag: 122cm (W) × 66cm (D)
750L Bag: 134cm (W) × 69cm (D)
1000L Bag: 146.3cm (W) × 71.5cm (D)
2000L Bag: 176cm (W) × 82.5cm (D)

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Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

About Your New Eucalyptus spathulata – Swamp Mallet

Eucalyptus spathulata, the swamp mallet, is a Western Australian tree with smooth coppery bronze to dark grey bark that peels each year to a satin finish. Narrow, bright green leaves form a dense, fine textured and rounded crown on a slender trunk, and small white flowers open from late winter into spring.

It wants full sun and free draining sandy or gravelly soil, and it is at home in hot, dry, exposed and coastal positions. Growth is 50 centimetres to 1 metre a year, and established trees shrug off drought, salt wind and light to moderate frost. Maintenance comes down to almost nothing.

At 6 to 10 metres tall and 4 to 6 metres across it fits street verges, car parks, avenues and windbreaks without outgrowing them, and it suits Mediterranean style and native gardens. Space it 3 metres apart in an avenue, or 3 to 4 metres as a feature. Tidy year round, and thrifty with water once away.

Frequently Asked Questions

About Swamp Mallet

What is Eucalyptus spathulata?

Swamp mallet is a Western Australian eucalypt with smooth coppery bronze to dark grey bark that sheds annually to a satin finish, and narrow bright green leaves in a dense rounded crown. Small white flowers open from late winter into spring. It is evergreen, fast growing and very tough in dry, exposed country.

How big does Swamp Mallet grow?

Mature trees sit at 6 to 10 metres tall with a spread of 4 to 6 metres, forming an upright, compact head on a single slender trunk. That scale suits street verges, car parks and suburban blocks where a full sized gum would be too much. The canopy stays tidy without shaping.

Where does it grow best in Australia?

It performs best in southern Western Australia, South Australia, Victoria and the drier parts of New South Wales, particularly on sandy or gravelly ground with low to moderate rainfall. It also handles saline and exposed coastal sites. Humid subtropical conditions with heavy summer rain suit it least of all.

Is it drought and salt tolerant?

Once established it is both. It comes from low rainfall country in the Western Australian wheatbelt and is used there for windbreaks and salinity control, so it copes with dry summers, salty soils and salt laden wind. First year watering still matters; after that, supplementary irrigation is rarely needed.

When does it flower?

From late winter into spring, roughly August to October, with small creamy white flowers clustered through the canopy. They are nectar rich and bring in honeyeaters and native bees. Flowering is followed by small woody gumnuts that hold on the tree and add a bit of texture through summer.

Does it have invasive roots?

Its root system is more restrained than that of the large forest gums, but it is still a eucalypt. Keep it about 4 to 5 metres clear of paving, house foundations, septic lines and stormwater pipes. Planted with that clearance it has a good track record as a street and car park tree.

How do I care for Swamp Mallet?

Water fortnightly through the first summer to establish the roots, then leave it to rainfall. Mulch with gravel or coarse bark. Prune only for clearance or to remove damaged wood, in late winter. It needs no feeding on most soils, and heavy watering or rich fertiliser does more harm than good.

Enriched Planting Mix (AO Certified)

$21.95

Enriched Planting Mix is a certified organic blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent, bagged in 30L. It is built to be dug through existing garden soil at planting time rather than used on its own, and the gypsum is what sets it apart from a plain compost.

Gypsum helps break up heavy clay so water and roots can move through it, while the compost and manure return organic matter and nutrient to tired ground. The coarse bark holds structure and keeps air around the root zone, and the wetting agent keeps moisture in the soil longer after rain or watering.

Use it when planting trees, shrubs, roses, fruit trees and exotic garden plants, particularly into clay. Dig a hole twice the width of the pot and 7 centimetres deeper, then mix roughly one third planting mix through the excavated soil. Spread 7 centimetres of that improved soil in the base before setting the plant in.

Frequently Asked Questions

About Enriched Planting Mix

What is Enriched Planting Mix made from?

It is a blend of Pure Magic Compost, composted animal manure, gypsum, composted coarse bark and a wetting agent. Each part has a job. The compost and manure supply organic matter and nutrient, the gypsum works on clay structure, the bark keeps air around the roots and the wetting agent holds moisture in the soil.

What plants is it suitable for?

It suits exotic garden plants, including roses, ornamental and deciduous trees, fruit trees, shrubs and perennials, and it earns its keep most on heavy clay sites. It is a planting mix rather than a potting mix, so its job is improving soil at planting time. Phosphorus sensitive natives are the one clear exception.

Is it safe for natives?

No, not for the phosphorus sensitive ones. The composted animal manure in this blend lifts phosphorus well above what Proteaceae such as Banksia, Grevillea, Hakea and Protea will tolerate, and the result can be leaf burn, dieback and plant death. Use the Native Potting Mix for those species, or plant them into unimproved local soil.

Is it certified organic?

Yes. It is a certified organic product with no chemical additives, which is why the manure and compost in it are fully composted rather than raw. That makes it sound around fruit trees and vegetable beds, and it means you are adding genuine organic matter to your soil rather than a synthetic conditioner.

How much do I need?

Work on roughly one third planting mix to two thirds of the soil you dug out of the hole. For a shrub out of a 200 millimetre pot that is only a few litres. An advanced tree going into a large hole will take considerably more. Judge the quantity by the volume of the hole rather than the size of the plant.

Can I use it in pots?

It is not a potting mix and should not be used on its own in a container. The blend is designed to be diluted through garden soil, and used straight in a pot it holds too much water and settles badly. For containers, reach for a premium potting mix, or the native mix if you are potting natives.

Does it need to be watered in?

Yes. Water the plant well several hours before you plant it, then water thoroughly again once the hole is backfilled and the soil firmed down. That first deep watering settles the improved soil around the root ball and drives out air pockets. Keep the water up over the first few months while the roots establish.

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Enriched Planting Mix (AO Certified)

$21.95

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Uses in my Garden

Feature Tree
Avenue Planting
Windbreak
Council or Civic Landscapes

Eucalyptus spathulata – Swamp Mallet works in an:

Australian Native Garden – celebrates local plants with natural character.
Modern Garden – sleek, minimal, and design-led planting.
Coastal Garden – relaxed, seaside feel with hardy, textural plants.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Eucalyptus spathulata – Swamp Mallet Evergreen or Deciduous?

Eucalyptus spathulata – Swamp Mallet is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 6m to 10m

Mature Width: 4m to 6m

Eucalyptus spathulata – Swamp Mallet is expected to grow 50cm to 100cm per year (fast).

Growth Rate of Eucalyptus spathulata – Swamp Mallet

Eucalyptus spathulata – Swamp Mallet is expected to grow 50cm to 100cm per year (fast).

They are considered to have a:

Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Eucalyptus spathulata – Swamp Mallet

Is Eucalyptus spathulata – Swamp Mallet frost tolerant?

Eucalyptus spathulata – Swamp Mallet is Frost Tolerant – Can handle light to moderate frost once established.

Does Eucalyptus spathulata – Swamp Mallet Flower?

Eucalyptus spathulata produces clusters of small creamy-white fluffy flowers from late summer into autumn. These soft blooms sit neatly along the slender branchlets and create a gentle seasonal highlight against its narrow, glossy green foliage and smooth coppery bark.

Does Eucalyptus spathulata – Swamp Mallet flower?

Yes - Flowers

Flowering Period:

Winter
Spring

Flower Type:

Clustered
Pollinator-attracting

Flower Colour:

White

Is Eucalyptus spathulata – Swamp Mallet an Australian Native Tree?

Yes

Eucalyptus spathulata – Swamp Mallet is Native to Southern Western Australia, particularly around the Esperance region, where it grows naturally in sandy and clay-loam soils, often in low-lying areas.

What is the Wildlife Value of Eucalyptus spathulata – Swamp Mallet ?

Its nectar-rich flowers attract honeyeaters, native bees, butterflies and a range of beneficial insects. The evergreen canopy provides perching and shelter for small birds, while the smooth bark supports insects and microfauna that contribute to a biodiverse native garden ecosystem.

How much Sunlight does Eucalyptus spathulata – Swamp Mallet need?

Eucalyptus spathulata – Swamp Mallet will thrive best in:

Full Sun

Preferred Soil?

Eucalyptus spathulata performs best in well-drained sandy or loam soils and tolerates slightly acidic to slightly alkaline conditions. It may struggle in heavy clay or poorly drained ground unless improved with organic matter and coarse material to enhance drainage. Keep soil evenly moist during establishment, then transition to deep, occasional watering as the tree matures to support strong drought resilience, healthy growth and its naturally elegant mallet form.

Is Eucalyptus spathulata – Swamp Mallet Drought Tolerant?

Is Eucalyptus spathulata – Swamp Mallet Drought tolerant?

As a young tree it requires regular watering, but once established Eucalyptus spathulata develops excellent drought tolerance. Despite its common name, it thrives in hot, dry and exposed environments and maintains its tidy, mallet-form canopy with minimal supplementary watering.

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How To Plant Your Eucalyptus spathulata – Swamp Mallet

Site: Choose a well-drained position in full sun to part shade with room for the canopy to develop.

Soil preparation: Enrich the planting area with quality compost and aged manure for a strong establishment phase.

Hole: Dig twice as wide as the root ball and the same depth.

Planting: Position level with the surrounding soil, backfill gently, firm in, then water deeply to settle the roots.

Recommended Planting Spacing For Your Eucalyptus spathulata – Swamp Mallet

Feature tree: 3 to 4 metres apart to allow the full canopy and form to develop.

Avenue planting: 3 metres apart for a uniform soft-textured avenue.

Eucalyptus spathulata – Swamp Mallet is expected to grow 50cm to 100cm per year (fast).

Fast Growth Rate

Long Term Care For Your Eucalyptus spathulata – Swamp Mallet

Watering: Water deeply twice weekly through the first 12 months. Once established, this is drought tolerant and only needs a deep soak during extended dry periods.

Mulching: Apply a 5 to 7 centimetre layer of organic mulch over the root zone, keeping it 5 centimetres clear of the trunk.

Pruning: Minimal pruning required. Light tip prune in late winter to maintain shape, and remove lower branches as the tree grows to develop a clean feature trunk.

Fertilising: Apply a slow-release native blend in early spring and again in autumn. Avoid high-phosphorus formulations as a precaution.

Pest and disease: Hardy against most pests and diseases. Occasional inspection in warm humid conditions is all that's needed.

Planting Your Eucalyptus spathulata – Swamp Mallet in Different Soil

Eucalyptus spathulata performs best in well-drained sandy loam or loam with a slightly acidic to neutral pH. Adaptable to a wide range of soils when drainage is improved with organic matter.

Sandy soil: Free-draining and ideal. Mulch well to maintain consistent moisture.

Clay soil: Improve drainage with gypsum and organic compost before planting.

Loam: The preferred soil for steady root development and consistent growth.

pH: Slightly acidic to neutral preferred. Mulch with composted leaf litter to maintain levels naturally.