Magnolia grandiflora 'Coolwyn Gloss'

Size: 750L
Sale price$6,400.00

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.

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About This Tree

Botanical Profile

Explore the essential characteristics and growth habits of this plant, curated to assist you in making an inspired and confident choice for your landscape.

Mature Height & Width

Mature Height

9 – 12 meters

Mature Width:

6 – 9 meters

Expected Growth Pear Year

Approx 20 – 30 cm per year (slow to moderate)

  • Medium Growth Rate
Evergreen/ Deciduous

Evergreen (foliage year round)

Frost Tolerance

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

Sunlight Tolerance
  • Full Sun
Form & Shape

Magnolia grandiflora 'Coolwyn Gloss' is considered:

  • Upright
  • Broad
Australian Native?

No

Flowering Information

Flower Colour: White

Flower Type:

Flowering Period

  • Summer
  • Autumn
Foliage Type / Shape
  • Broad

As Featured In

Here Is What Customers Like You Frequently Ask

FAQ

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.

About

Planting Guide

Plant Spacing

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

How to Plant Magnolia grandiflora 'Coolwyn Gloss'

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.

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)

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