Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

$145.00

Tax included. Shipping calculated at checkout.

Size: 30cm/33cm

30cm/33cm 40cm/45L

Current Stock Height Guides

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: 4m to 8m

Mature Width: 2m to 4m

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is expected to grow 60cm to 1.2m per year under suitable conditions.

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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Phone: (03) 7042 3318

About Your New Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

Casuarina glauca 'Greenwave' PBR is a selected form of the Australian swamp oak grown as a dense, upright evergreen screen. The soft deep green branchlets hang in fine curtains and give the plant a texture closer to a conifer than a broadleaf shrub. Growth is naturally even, with foliage carried low on the plant.

Full sun and free-draining soil suit it best, though it copes with sand, clay, salt wind, seasonally wet ground and long dry spells once established. It puts on 60 centimetres to 1.2 metres a year in good conditions. Light to moderate frost is no trouble, and established plants take colder snaps than that.

It is specified for privacy screens, windbreaks, boundary planting and exposed coastal sites where evergreen structure has to survive without much help. Rural properties use it in shelter rows. The fine foliage filters wind rather than blocking it, which reduces turbulence on the leeward side and protects whatever is planted behind.

Frequently Asked Questions

About Greenwave Swamp Oak

How fast does Greenwave Swamp Oak grow?

Between 60 centimetres and 1.2 metres a year in suitable conditions, which puts it among the faster evergreen screening natives. Growth is quickest in warm weather with reliable moisture over the first two or three years. Once the plant reaches useful height, trimming the leaders slows extension and pushes density into the sides.

How big does it grow?

Grown as a screen it reaches about 3 to 5 metres tall and 2 to 3 metres wide, and it is easily held lower with an annual trim. Left alone in an open rural position it will run taller. Height is straightforward to control because the plant reshoots readily from trimmed green growth.

How far apart should I plant it for a screen?

For a continuous evergreen screen or windbreak, 1.5 to 2 metres apart is the practical spacing, closing over within two to three seasons. As individual specimens with room to develop full form, allow 3 to 4 metres, or 3 metres for an even avenue line. Stagger two rows for a solid rural shelter belt.

Is it suitable for coastal positions?

Yes, and it is one of the better choices for exposed sites. Casuarina glauca grows naturally on estuarine flats and tolerates salt spray, sandy soil and constant wind. It is used on front line coastal boundaries, in beachside developments and on windswept rural blocks where conventional screening plants defoliate.

Is it drought tolerant?

Once established, yes. The root system goes deep and the fine branchlets lose far less moisture than broad leaves, so the plant holds condition through long dry periods. Water regularly for the first two summers to build that root system. In prolonged drought a deep soak every few weeks keeps foliage colour good.

Does it have invasive roots?

The wild species is known for suckering in wet ground, so roots are best kept clear of drains, septic lines and shallow paving. In normal garden soil with a metre or so of clearance it causes no trouble. Where the site is tight or the ground stays wet, allow more room or install a root barrier.

How do I care for Greenwave Swamp Oak?

Water deeply through the first two summers, mulch to hold moisture and keep weeds down, and feed once in spring with a low phosphorus native fertiliser if growth is slow. Trim two or three times a year for a formal screen, always cutting into green growth. Old bare wood reshoots slowly, so avoid hard cutting back.

Uses in my Garden

Screening or Privacy
Windbreak

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak works in an:

Coastal Garden – relaxed, seaside feel with hardy, textural plants.
Contemporary / Architectural Garden – striking forms for bold design statements.
Australian Native Garden – celebrates local plants with natural character.

Is Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak Evergreen or Deciduous?

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 4m to 8m

Mature Width: 2m to 4m

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is expected to grow 60cm to 1.2m per year under suitable conditions.

Growth Rate of Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is expected to grow 60cm to 1.2m per year under suitable conditions.

They are considered to have a:

Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

Is Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak frost tolerant?

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is Frost Tolerant – Can handle light to moderate frost once established.

Does Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak Flower?

Casuarina glauca ‘Greenwave’ produces small inconspicuous flowers during the warmer months, occasionally followed by decorative woody seed cones. While flowering is subtle, the plant is primarily valued for its fine-textured evergreen foliage and dense spreading growth habit.

Does Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak flower?

Flowering Period:

Flower Type:

Flower Colour:

Is Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak an Australian Native Tree?

Yes

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is Native to Derived from Australian Casuarina glauca selections.

What is the Wildlife Value of Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak ?

Its dense evergreen foliage provides valuable shelter and habitat for small birds and beneficial insects throughout the year. The spreading low-growing habit also contributes to biodiversity within native and coastal landscapes by creating protected ground-level habitat coverage.

How much Sunlight does Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak need?

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak will thrive best in:

Full Sun

Preferred Soil?

Casuarina glauca ‘Greenwave’ performs best in free-draining sandy or loam soils with a neutral to slightly acidic pH. It will also tolerate poorer soils, exposed coastal conditions and a range of challenging landscape environments provided drainage remains reliable. Avoid persistently wet or heavily compacted conditions unless significantly improved, as excess moisture can reduce root health and overall vigour. Keep soil lightly moist during establishment, then gradually reduce watering as the plant matures.

Is Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak Drought Tolerant?

Is Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak Drought tolerant?

As a young plant it benefits from regular watering to establish a healthy root system, particularly during warmer weather. Once established, ‘Greenwave’ shows excellent drought tolerance and performs reliably through extended dry periods with minimal supplementary watering.

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How To Plant Your Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

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 Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

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.

Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak is expected to grow 60cm to 1.2m per year under suitable conditions.

Fast Growth Rate

Long Term Care For Your Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak

Watering: Water deeply twice weekly through the first 12 months. Once established, reduce to once weekly in dry periods. Mulch helps maintain consistent moisture.

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 if used as hedging or screening. For a clear trunk feature, remove lower branches as the tree grows.

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 Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak in Different Soil

Casuarina glauca 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.

Frequently Asked Questions

Q: Is Greenwave suitable for coastal conditions?
A: Yes, it performs exceptionally well in coastal and wind-exposed environments.

Q: Is it suitable for screening?
A: Yes, its dense upright growth habit provides excellent evergreen privacy screening.

Q: Is it drought tolerant?
A: Yes, once established it performs reliably in low-water landscapes.

Q: Does it tolerate pruning?
A: Yes, it responds well to trimming and formal shaping where required.

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Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak