Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak
Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak
Dense fine evergreen foliage provides highly effective screening and wind protection in exposed coastal conditions.
Regular price
$170.00
Sale price
$170.00
Regular price
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Pot size
Available batches
- Current height guide
- Please enquire
- Pot size
- 30cm/33cm
Approximate only. Minimum height important? Confirm with us.
Height guide & disclaimer
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 must confirm 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.
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About this tree
About this tree
- Mature height
- 4m to 8m
- Mature width
- 2m to 4m
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.
Mature height & width
Mature height & width
- Mature height
- 4m to 8m
- Mature width
- 2m to 4m
Pot sizes & dimensions
Pot sizes & dimensions
| Pot / bag size | Width | Depth |
|---|---|---|
| 30cm Pot | 33cm | 30cm |
| 40cm/45L Pot | 44cm | 41.5cm |
| 50cm Pot / 70L Pot | 55cm | 41.8cm |
| 100L Bag | 50.6cm | 52.8cm |
| 150L Bag | 66cm | 55cm |
| 200L Bag | 71.5cm | 60.5cm |
| 300L Bag | 88cm | 63.8cm |
| 400L Bag | 99cm | 66cm |
| 500L Bag | 122cm | 66cm |
| 750L Bag | 134cm | 69cm |
| 1000L Bag | 146.3cm | 71.5cm |
| 2000L Bag | 176cm | 82.5cm |
General planting reference from our existing size guide. Actual containers can vary by supplier and batch; confirm exact dimensions if required.
Delivery & pickup
Delivery & pickup
Trade enquiries
Trade enquiries
We supply advanced trees to landscapers, developers, architects, and councils Australia-wide. Trade clients receive fast quotes, expert advice, and access to premium stock with reliable freight.
Freight estimate
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Final delivery cost is confirmed at checkout using your full address.
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Measure only the boundary you intend to plant—exclude gates and gaps. Spacing is centre to centre. Quantities are rounded up for one row, allowing roughly half the spacing at each end. Site conditions and pruning affect the final hedge.
About Casuarina glauca ‘Greenwave’ PBR
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.
- Foliage
Evergreen (foliage year round)
- Position
- Form
- Use
- Mature height
- 4m to 8m
- Mature width
- 2m to 4m
Planting Information
Recommended Planting Spacing For Your 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.
Long Term Care For Your Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak
Planting Your Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak in Different Soil
Uses in my Garden
Uses in my Garden
Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak works in an:
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:
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:
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.
Frequently Asked Questions
Frequently Asked Questions
Compare sizes side by side
30cm/33cm
Enquire for current heights
40cm/45L
Enquire for current heights
Heights are approximate and vary between individual trees.
Casuarina glauca ‘Greenwave’ PBR is loved for its Dense fine evergreen foliage provides highly effective screening and wind protection in exposed coastal conditions.
We take pride in supplying A+ grade advanced trees. When stock at our farm is not yet ready, we work with our trusted trade suppliers to source the best available trees for your garden.
Plant Your Casuarina glauca ‘Greenwave’ – Greenwave Swamp Oak With:
Trachelospermum jasminoides Balls – Star Jasmine Balls
Trachelospermum jasminoides Balls – Star Jasmine Balls
Trachelospermum jasminoides 'Balls' is Star Jasmine grown and clipped into a dense evergreen sphere. The small glossy leaves sit tight on a woody framework, holding a clean rounded outline year round. White pinwheel flowers open in spring and carry a strong sweet scent right across a courtyard.
Ball specimens hold at about 1 to 1.5 metres tall and wide with light clipping. Full sun to part shade suits them, in any free draining soil. Growth is slow to moderate at 30 to 50 centimetres a year. They handle coastal exposure, light frost and dry spells once the roots are down.
Repeat them along a driveway, either side of an entry, or in pots on a terrace where a formal shape is wanted straight away. They read as structure in a planting scheme without the height of a hedge, and because the form is already trained, a new garden looks settled from the day it goes in.
Frequently Asked Questions
About Star Jasmine Balls
What are Star Jasmine Balls?
They are Trachelospermum jasminoides, the common Star Jasmine, grown and clipped into a dense evergreen sphere on a woody framework. Instead of climbing, the plant is trained into a self supporting rounded shape. The foliage is small, glossy and dark green, and the plant carries scented white flowers through spring.
How big do Star Jasmine Balls grow?
They hold at roughly 1 to 1.5 metres tall and 1 to 1.5 metres wide. Growth is slow to moderate at 30 to 50 centimetres a year, so a light clip once or twice a year keeps the ball tight at whatever size within that range suits the setting.
Do Star Jasmine Balls need sun or shade?
Full sun to part shade both work. Full sun gives the densest foliage and the heaviest flowering, while part shade produces slightly softer, more open growth and fewer flowers. Avoid deep shade, where the ball thins out and loses its outline. Morning sun with afternoon protection suits hot inland gardens.
Can Star Jasmine Balls be grown in pots?
Yes, and pots are one of the main uses. A container 50 to 60 centimetres wide with a quality free draining mix will hold a ball for years. Water more often than you would in the ground, especially in summer, and feed in spring and again in late summer. Refresh the mix every few years.
Are Star Jasmine Balls evergreen?
Yes, the foliage is held year round. The glossy dark green leaves take on a bronze tinge in cold weather and green up again in spring, but the plant never goes bare. That is what makes it useful as permanent structure in a scheme, particularly in winter once perennials have died back.
When do Star Jasmine Balls flower?
Flowering runs through spring, roughly September to November, and often carries into early summer in warmer districts. The white pinwheel flowers are small but produced in quantity, and the scent is strong on still evenings. Flowering is heaviest on plants in full sun that were not clipped hard just before bud set.
How do I prune and care for Star Jasmine Balls?
Clip lightly with hedging shears once after flowering and again in late summer if needed, taking only the new growth to keep the outline crisp. Water deeply in dry weather, mulch the base, and feed in early spring. The sap is milky and can irritate skin, so wear gloves when trimming.
Trachelospermum jasminoides Balls – Star Jasmine Balls
Westringia fruticosa – Coastal Rosemary
Westringia fruticosa – Coastal Rosemary
Westringia fruticosa, Coastal Rosemary, is an Australian native evergreen shrub from the headlands and dunes of the east coast. It builds a dense rounded bush of fine grey green leaves held in whorls, with small white to pale lilac flowers. Despite the common name it is not the culinary herb.
Mature plants sit at 1.5 to 2 metres tall and 1.5 to 2 metres wide, growing 30 to 60 centimetres a year, and they clip smaller without complaint. Full sun to part shade and sharp drainage are the requirements. Salt wind, sandy soil, drought and light to moderate frost are all handled.
It is a standard on coastal projects, road verges, council garden beds and exposed banks that need erosion cover. Plant 1 to 1.5 metres apart for an informal screen, or 80 centimetres for a clipped hedge. A single plant fills a 40 to 50 centimetre pot on a courtyard or balcony.
Frequently Asked Questions
About Coastal Rosemary
What is Coastal Rosemary?
Westringia fruticosa is an Australian native evergreen shrub from the headlands and dunes of the east coast. It forms a dense rounded bush of fine grey green leaves held in whorls, with small white to pale lilac flowers. Despite the common name it is not culinary rosemary and is not used in cooking.
How big does Coastal Rosemary grow?
Mature plants reach 1.5 to 2 metres tall and 1.5 to 2 metres wide. It clips readily to smaller dimensions and is often maintained at around a metre as a hedge or a low mound. Growth is moderate, roughly 30 to 60 centimetres a year, so it holds a trimmed shape well.
Is Coastal Rosemary suitable for coastal positions?
It is one of the best shrubs available for exposed coastal work. It grows naturally on sea cliffs and copes with salt laden wind, sand and reflected heat. It is used constantly on beachfront reserves, dune stabilisation projects and seaside gardens where little else holds a tidy shape.
When does Coastal Rosemary flower?
The main flush is spring and summer, roughly September through February, with scattered flowering at other times of the year in mild districts. The flowers are small, white to pale lilac and sit among the foliage rather than above it. Clipped hedges flower less than plants left to grow informally.
How far apart should I plant Coastal Rosemary for a hedge?
Space plants 80 centimetres apart for a tight formal hedge, or 1 to 1.5 metres apart for a dense informal screen. On banks and batters used for erosion cover, 1 metre in a staggered grid gives full ground coverage within about two growing seasons.
Can Coastal Rosemary grow in pots?
Yes. A pot 40 to 50 centimetres wide suits a single plant for a courtyard, entry or balcony. Use a free draining mix, because the roots will not tolerate sitting wet. Container plants need watering more often than those in the ground, plus a light trim to hold their shape.
How do I prune and care for Coastal Rosemary?
Trim lightly two or three times a year, taking the soft new growth and avoiding cuts into bare old wood, which reshoots poorly. Water through the first summer, then only in extended dry spells. On most soils it needs no feeding at all, and it resents heavy watering and poor drainage.
Westringia fruticosa – Coastal Rosemary
Westringia ‘Wynyabbie Blue’ – Wynyabbie Blue Coastal Rosemary
Westringia ‘Wynyabbie Blue’ – Wynyabbie Blue Coastal Rosemary
Westringia 'Wynyabbie Blue' is a hardy Australian native shrub grown for its lilac blue flowers, which are larger and more freely carried than those of the common white forms. Narrow grey green leaves sit in neat whorls on a dense rounded frame that holds its shape through the year.
Expect 1.5 to 2 metres in height and width at maturity, at 30 to 60 centimetres a year. Full sun brings the heaviest flowering, though part shade is accepted. Drainage matters above everything else, after which it takes salt wind, sandy or gravelly ground, drought and light to moderate frost.
Mass plantings on batters, median strips and coastal frontages are where it earns its keep, and it clips into a low hedge of about a metre without losing its flowering. Plant 1 to 1.5 metres apart for an informal screen. One plant fills a 40 to 50 centimetre pot neatly.
Frequently Asked Questions
About Wynyabbie Blue Coastal Rosemary
What is Westringia Wynyabbie Blue?
Westringia 'Wynyabbie Blue' is a hardy Australian native shrub grown for its lilac blue flowers, which are larger and more freely carried than those of the common white forms. Narrow grey green leaves sit in neat whorls on a dense rounded frame. It is evergreen and holds its structure all year.
How big does Wynyabbie Blue grow?
It reaches 1.5 to 2 metres tall and 1.5 to 2 metres wide at maturity, growing 30 to 60 centimetres a year. It clips comfortably to around a metre if you want a lower hedge, and it will hold that height indefinitely given two or three light trims a year.
When does Wynyabbie Blue flower?
From spring right through autumn, roughly September to May, with sporadic flowers in winter in mild districts. The lilac blue flowers open in flushes rather than all at once, so there is usually some colour on the plant. Flowering is heaviest in full sun on lean, well drained soil.
Is Wynyabbie Blue drought tolerant?
Yes. Once the roots are established it needs very little water and copes with extended dry periods, which is why it is used on unirrigated median strips and road verges. Drainage matters more than watering, since the plant will die in soggy ground long before it dies of thirst.
Is Wynyabbie Blue suitable for coastal positions?
It is. Salt laden wind, sandy soils and reflected heat are all handled, and it is planted routinely on foreshore reserves and beachside gardens. In very exposed frontal positions the plant stays lower and denser than it would inland, which generally suits the situation anyway.
How far apart should I plant Wynyabbie Blue for a hedge?
Use 80 centimetres between plants for a clipped formal hedge, or 1 to 1.5 metres for a dense informal screen. For mass planting on banks and median strips, 1 metre in a staggered pattern gives full coverage within about two growing seasons and shades out most weeds.
How do I prune and care for Wynyabbie Blue?
Trim lightly after each flowering flush, taking soft growth only. Cutting back into bare old wood leaves gaps that will not fill in, so stay on top of it rather than letting it get away. Water through the first summer, then rarely. Avoid rich soils and heavy fertiliser.
Westringia ‘Wynyabbie Blue’ – Wynyabbie Blue Coastal Rosemary
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