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Magnolia grandiflora 'Coolwyn Gloss'

Magnolia grandiflora 'Coolwyn Gloss'

Most loved for its large, glossy dark green leaves with velvety bronze undersides, and its huge creamy-white perfumed flowers that appear through summer and autumn.

Regular price $400.00
Sale price $400.00 Regular price
Tax included. Shipping calculated at checkout.
Pot size
Available batches
Size: 40cm/45L
Current height guide
Please enquire
Pot size
40cm/45L

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.

Quantity

Order multiple sizes

Mix pot sizes and batches in one order.

Size / batchEachQuantity
40cm/45LApprox. height: Approx. 1.4m – 2.5m$400.00
75LApprox. height: Enquire for current heights$560.00
100LApprox. height: Approx. 2.0m – 2.4m$900.00
200LApprox. height: Enquire for current heights$1,800.00
500LApprox. height: Approx. 3.2m – 4.0m$4,480.00
750LApprox. height: Enquire for current heights$7,170.00
1000LApprox. height: Enquire for current heights$7,840.00

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.

Subtotal before discounts & delivery$0.00

Delivery is calculated at checkout.

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    About Magnolia grandiflora 'Coolwyn Gloss'

    Magnolia grandiflora 'Coolwyn Gloss' is a striking evergreen magnolia selected for its exceptionally glossy dark green foliage and large fragrant white flowers. The lacquer-like sheen of the leaves, set against bronze undersides, gives it a richness and presence that sets it apart from other evergreen magnolias.

    Coolwyn Gloss grows to 9-12 metres tall and 6-9 metres wide, making it one of the larger evergreen magnolia cultivars. The substantial size and dense habit suit avenue planting, large feature positions, and tall privacy screens, where compact cultivars like Teddy Bear and Little Gem are better for smaller gardens.

    Coolwyn Gloss is adaptable across most Australian climates, preferring well-drained, slightly acidic soils and full sun to part shade. It is low maintenance, drought tolerant once established, and pest resistant, producing large fragrant white flowers through late spring and summer.

    Frequently Asked Questions

    About Magnolia grandiflora 'Coolwyn Gloss'

    How tall does Coolwyn Gloss Magnolia grow?

    Magnolia grandiflora 'Coolwyn Gloss' grows to 9-12 metres tall and 6-9 metres wide, making it one of the larger evergreen magnolia cultivars.

    How fast does Coolwyn Gloss grow?

    Coolwyn Gloss has a moderate growth rate of 30-50cm per year once established.

    When does Coolwyn Gloss flower?

    Coolwyn Gloss produces large fragrant white flowers through late spring and summer, typically November to February across Australia.

    What makes Coolwyn Gloss different from other magnolias?

    Coolwyn Gloss is selected for its exceptionally glossy dark green foliage and larger size. It suits avenue planting and large feature positions, where compact cultivars like Teddy Bear and Little Gem suit smaller gardens.

    Is Coolwyn Gloss evergreen?

    Yes. Coolwyn Gloss is fully evergreen, holding glossy dark green foliage with bronze undersides year-round.

    Where does Coolwyn Gloss grow best in Australia?

    Coolwyn Gloss is adaptable across most Australian climates, preferring well-drained, slightly acidic soils and full sun to part shade.

    How far apart should I plant Coolwyn Gloss?

    Plant 4-6 metres apart for an avenue or screen, or as individual feature trees with room for the full canopy to develop.

    Foliage

    Evergreen (foliage year round)

    Position
    • Full Sun
    Form
    • Upright
    • Broad
    Use
    • Feature Tree
    • Screening or Privacy
    • Shade Tree
    • Council or Civic Landscapes
    Mature height
    6m to 10m (approx.)
    Mature width
    6m to 9m
    Magnolia grandiflora 'Coolwyn Gloss' — project image 1

    Planting Information

    How To Plant Your Magnolia grandiflora 'Coolwyn Gloss'

    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 Magnolia grandiflora 'Coolwyn Gloss'

    Hedging and screening: 1 to 1.5 metres apart for a dense informal screen, or 80 centimetres apart for a tighter formal hedge.

    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.

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

    • Medium Growth Rate

    Long Term Care For Your Magnolia grandiflora 'Coolwyn Gloss'

    Watering: Water deeply twice weekly through the first 12 months. Once established, keep the root zone consistently moist with weekly deep watering and additional water during hot dry spells.

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

    Pruning: Tip prune in late winter and again in summer to build dense growth. For a formal hedge, light shaping two to three times a year keeps lines crisp.

    Fertilising: Apply a slow-release general-purpose fertiliser in early spring and again in autumn for steady growth and consistent foliage colour.

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

    Planting Your Magnolia grandiflora 'Coolwyn Gloss' in Different Soil

    Magnolia grandiflora performs best in rich, well-drained loam with a slightly acidic pH and consistent moisture. Adaptable to a wide range of soils when drainage and organic matter are managed well.

    Sandy soil: Free-draining but enrich heavily with compost and mulch deeply to hold moisture.

    Clay soil: Improve drainage with gypsum and organic compost, and mound slightly to lift the root zone.

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

    pH: Slightly acidic preferred. Mulch with composted leaf litter or pine bark to maintain levels naturally.

    Uses in my Garden

    Uses in my Garden

    • 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.

    Is Magnolia grandiflora 'Coolwyn Gloss' Evergreen or Deciduous?

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

    Mature Height & Width

    Mature Height: 6m to 10m (approx.)

    Mature Width: 6m to 9m

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

    Growth Rate of Magnolia grandiflora 'Coolwyn Gloss'

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

    They are considered to have a:

    • Medium Growth Rate

    Frost Tolerance & Ideal Climate to plant Magnolia grandiflora 'Coolwyn Gloss'

    Is Magnolia grandiflora 'Coolwyn Gloss' frost tolerant?

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

    Does Magnolia grandiflora 'Coolwyn Gloss' Flower?

    Magnolia grandiflora 'Coolwyn Gloss'

    Does Magnolia grandiflora 'Coolwyn Gloss' flower?

    • Yes - Flowers

    Flowering Period:

    • Summer
    • Autumn

    Flower Type:

    • Fragrant
    • Pollinator-attracting

    Flower Colour:

    White

    Is Magnolia grandiflora 'Coolwyn Gloss' an Australian Native Tree?

    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.

    What is the Wildlife Value of Magnolia grandiflora 'Coolwyn Gloss' ?

    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.

    How much Sunlight does Magnolia grandiflora 'Coolwyn Gloss' need?

    Magnolia grandiflora 'Coolwyn Gloss' will thrive best in:

    • Full Sun

    Preferred 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.

    Is Magnolia grandiflora 'Coolwyn Gloss' Drought Tolerant?

    Is Magnolia grandiflora 'Coolwyn Gloss' Drought tolerant?

    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.

    Frequently Asked Questions

    How tall does Coolwyn Gloss Magnolia grow?

    Magnolia grandiflora 'Coolwyn Gloss' grows to 9-12 metres tall and 6-9 metres wide, making it one of the larger evergreen magnolia cultivars.

    How fast does Coolwyn Gloss grow?

    Coolwyn Gloss has a moderate growth rate of 30-50cm per year once established.

    When does Coolwyn Gloss flower?

    Coolwyn Gloss produces large fragrant white flowers through late spring and summer, typically November to February across Australia.

    What makes Coolwyn Gloss different from other magnolias?

    Coolwyn Gloss is selected for its exceptionally glossy dark green foliage and larger size. It suits avenue planting and large feature positions, where compact cultivars like Teddy Bear and Little Gem suit smaller gardens.

    Is Coolwyn Gloss evergreen?

    Yes. Coolwyn Gloss is fully evergreen, holding glossy dark green foliage with bronze undersides year-round.

    Where does Coolwyn Gloss grow best in Australia?

    Coolwyn Gloss is adaptable across most Australian climates, preferring well-drained, slightly acidic soils and full sun to part shade.

    How far apart should I plant Coolwyn Gloss?

    Plant 4-6 metres apart for an avenue or screen, or as individual feature trees with room for the full canopy to develop.

    Compare sizes side by side

    Scroll to compare →

    40cm/45L

    Approx. 1.4m – 2.5m

    75L

    Enquire for current heights

    100L

    Approx. 2.0m – 2.4m

    200L

    Enquire for current heights

    500L

    Approx. 3.2m – 4.0m

    750L

    Enquire for current heights

    1000L

    Enquire for current heights

    Heights are approximate and vary between individual trees.

    Magnolia grandiflora 'Coolwyn Gloss' is loved for its large, glossy dark green leaves with velvety bronze undersides, and its huge creamy-white perfumed flowers that appear through summer and autumn.

    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 Magnolia grandiflora 'Coolwyn Gloss' With:

    Enriched Planting Mix (AO Certified)

    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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