Magnolia grandiflora 'Coolwyn Gloss' - Evergreen Trees Direct

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Magnolia grandiflora 'Coolwyn Gloss'

Name: Magnolia grandiflora 'Coolwyn Gloss'
Brand: Evergreen Trees Direct
SKU: MAGNCOOLGLOS750L
Price: 6400.00 AUD
Availability: InStock

$6,400.00

Tax included. Shipping calculated at checkout.

1000 in stock

Size: 750L

750L 500L 200L 100L 70L 40cm/45L

Current Stock Height Guides

40cm/45L: 1.5m – 1.8m Approx.
70L: 1.4m – 1.9m Approx.
100L: 2.4m – 2.8m Approx.
200L: Enquire within for height guide information.
500L: Enquire within for height guide information.
750L: Enquire within for height guide information.

Trade Customers

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.

About Magnolia grandiflora 'Coolwyn Gloss'

Magnolia grandiflora 'Coolwyn Gloss' is a stunning evergreen Southern Magnolia known for its glossy, dark green leaves and large, fragrant white flowers. Growing 9–12 meters tall and 6–9 meters wide, it features smooth gray bark and a slow to moderate growth rate.

This versatile tree thrives in well-draining, acidic soils and adapts to a range of conditions. It’s low maintenance, drought-tolerant, and pest-resistant, making it perfect as a striking specimen, grouped planting, or elegant hedge/privacy screen in gardens and landscapes.

Key Information to Know

Evergreen / Deciduous

Magnolia grandiflora 'Coolwyn Gloss' is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 6m - 10m Approximately

Mature Width: 6 – 9 meters

Magnolia grandiflora 'Coolwyn Gloss' is expected to grow Approx 20 – 30 cm per year (slow to moderate).

Frost Tolerance

Is Magnolia grandiflora 'Coolwyn Gloss' frost tolerant?

Magnolia grandiflora 'Coolwyn Gloss' is Frost Tolerant – Can handle light to moderate frost once established.

Flowering Information

Magnolia grandiflora 'Coolwyn Gloss'

Native Information

Is Magnolia grandiflora 'Coolwyn Gloss' an Australian Native? No

Magnolia grandiflora 'Coolwyn Gloss' is Native to Derived from Magnolia grandiflora, native to the southeastern United States. ‘Coolwyn Gloss’ is an Australian selection chosen for its dense foliage, improved gloss, and consistent flowering.

Wildlife Value

Its nectar-rich flowers attract bees, beetles and other pollinating insects, while the dense evergreen canopy offers excellent shelter and nesting habitat for small birds. The decorative seed cones that follow provide food for wildlife and contribute to a more biodiverse garden ecosystem.

Sunlight Information

Magnolia grandiflora 'Coolwyn Gloss' will thrive best in:

Full Sun

Preffered Soil

Magnolia grandiflora ‘Coolwyn Gloss’ performs best in well-drained, slightly acidic loam or sandy loam soils. It may struggle in heavy clay, alkaline or waterlogged soils unless improved with organic matter and coarse material to enhance drainage. Keep soil evenly moist during establishment, then maintain deep, occasional watering as the tree matures to support its drought resilience, dense evergreen foliage and reliable flowering.

Botanical Information

Common Name: Southern Magnolia

Genus: Magnolia

Botanical Species: grandiflora

Family: Magnoliaceae

Botanical Name: Magnolia grandiflora 'Coolwyn Gloss'

Landscape Uses

Feature Tree
Screening or Privacy
Shade Tree
Council or Civic Landscapes

Magnolia grandiflora 'Coolwyn Gloss' works in an:

Formal Garden – structured, symmetrical design with clipped shapes.
Modern Garden – sleek, minimal, and design-led planting.
Cottage Garden – romantic mix of flowers, colour, and texture.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Planting, Spacing & Care

Selecting the Location: Choose a well-draining site with full to partial sun exposure for planting your Southern Magnolia. Ensure it has sufficient space to accommodate its mature size.

Digging the Hole: Dig a hole that is roughly twice the width of the tree's root ball and of equal depth. This extra space will allow the roots to expand easily.

Positioning the Tree: Gently remove the tree from its container and place it in the center of the hole. Ensure the top of the root ball is level with the surrounding ground.

Backfilling: Fill the hole with the excavated soil, pressing it down firmly to eliminate air pockets. Water the tree thoroughly to help settle the soil.

Mulching: Apply a layer of mulch around the base of the tree to conserve moisture and regulate soil temperature.

Feature Planting: Space 6 – 9 m apart for natural form and flower impact

Hedging & Screening: Space 3 – 4 m apart for dense year-round screening

Avenue Planting: Space 5 – 6 m apart for structured planting lines

1. Watering: Once established, the Southern Magnolia is considered low maintenance. However, it requires regular watering, especially during droughts. In the first year, provide weekly watering. Afterward, water every other week unless drought conditions prevail, in which case weekly watering is recommended.

2. Pruning: Pruning is generally needed for shaping the tree or removing dead branches. However, the Southern Magnolia exhibits a natural tendency for self-pruning.

3. Soil Type: This tree is adaptable to various soil types but thrives best in well-draining, acidic soils. You can test your soil's acidity with an at-home soil test kit or seek advice from a local nursery or gardening center.

How to Grow in Different Soil Types

Magnolia 'Coolwyn Gloss' prefers moist, well-drained soil, but adapts well to various soil conditions:

Sandy Soil: Requires organic matter and mulch to retain moisture.

Clay Soil: Improve drainage with compost and sand to prevent water retention.

Loamy Soil: Ideal for root development, providing balanced nutrients and moisture.

Acidic or Alkaline Soil: Prefers slightly acidic to neutral soil, though it is adaptable to mild alkalinity.

Magnolia grandiflora 'Coolwyn Gloss' is expected to grow Approx 20 – 30 cm per year (slow to moderate).

Medium Growth Rate

Root Ball Dimensions (Width × Depth) For Planting

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)

Ideal Conditions

Subtropical QLD (Brisbane, Gold Coast, Sunshine Coast)
Northern NSW (Byron, Coffs, Armidale)
Sydney & Central Coast
South Coast NSW (Illawarra to Bega)
Inland NSW / Tablelands (Orange, Bathurst, Canberra)
Melbourne & Surrounds (Metro, Bayside, Geelong, Bellarine, Mornington)
Western District & Central VIC (Ballarat, Bendigo, Hamilton)
Gippsland (Latrobe Valley, East Gippsland)
Adelaide Metro & Coastal
Adelaide Hills & Barossa

Thrives in

Full Sun

Frost Tolerance

Frost Tolerant – Can handle light to moderate frost once established.

Drought Tolerance

As a young tree it requires regular watering, but once established ‘Coolwyn Gloss’ develops good drought tolerance. It performs well in warm, dry and urban environments and maintains its dense, upright form with deep, occasional watering during extended dry periods.

Flowering Information

Does Magnolia grandiflora 'Coolwyn Gloss' flower?

Yes - Flowers

Flowering Period:

Summer
Autumn

Flower Type:

Fragrant
Pollinator-attracting

Flower Colour:

White

Magnolia grandiflora 'Coolwyn Gloss'

Frequently Asked Questions

Q: Is the Southern Magnolia a fast-growing tree?
A: No, the Magnolia grandiflora 'Coolwyn Gloss' is considered a slow to moderately growing tree.

Q: What are the main uses of this magnolia cultivar in landscaping?
A: The Southern Magnolia is typically used for avenue planting, hedging, screening, and as a feature tree, adding elegance and natural beauty to outdoor spaces.

Q: Does it require high maintenance?
A: No, once established, this magnolia is low maintenance. However, it does need regular watering, particularly during its first year.

Q: Is the Southern Magnolia prone to pests and diseases?
A: This tree is generally resistant to pests and diseases, making it a reliable choice for landscaping.

Q: Can I grow other plants near the Southern Magnolia?
A: Yes, you can plant other garden vegetation near the Southern Magnolia, as long as it does not compete for resources and has similar sunlight and water requirements.

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