Magnolia Grandiflora 'Supergem'

$450.00

Tax included. Shipping calculated at checkout.

Size: 40cm/45L

40cm/45L 50cm/75L 100L

All stock is grown, maintained and graded in strict accordance with AS 4373-2007, Australian Standard for Nursery Stock.

Current Stock Height Guides

40cm/45L: Enquire within for height guide information.
100L: Enquire within for height guide information.

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: 6m - 10m Approximately

Mature Width: 3 – 4 meters

Magnolia Grandiflora 'Supergem' is expected to grow Approx 20 – 40 cm per year (moderate).

Root Ball Dimensions (Height & Width)

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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Shipping Cost

Shipping is calculated at checkout based on the pallet space your order occupies in the truck and your delivery location.

There is no charge to calculate your freight.

Contact Us

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Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

VOLUME DISCOUNTS

10% off orders over $1,000
15% off orders over $2,000
20% off orders over $7,500

Discounts Apply Automatically At Checkout

About Your New Magnolia Grandiflora 'Supergem'

Magnolia grandiflora 'Supergem' is a compact and elegant evergreen magnolia, prized for its smaller size and lush dark green foliage with velvety bronze undersides. It delivers all the classic magnolia beauty in a manageable form for smaller spaces.

Supergem grows to 6-8 metres tall and 3-4 metres wide, with a pyramidal to rounded crown and dense branching. Large fragrant creamy-white flowers, 20-25cm across, appear from late spring through early summer, sometimes flowering sporadically through the season. The compact form suits feature planting, tall privacy screens, and pleaching.

Supergem thrives in well-drained acidic soil, tolerates urban conditions, and is moderately drought tolerant once established. It prefers full sun to partial shade and needs only minimal pruning after flowering to maintain shape, performing well across most Australian climates.

Frequently Asked Questions

About Magnolia grandiflora 'Supergem'

How tall does Magnolia 'Supergem' grow?

Magnolia grandiflora 'Supergem' grows to 6-8 metres tall and 3-4 metres wide, making it one of the more compact evergreen magnolias.

How fast does 'Supergem' grow?

'Supergem' has a moderate growth rate of 30-50cm per year once established.

When does 'Supergem' flower?

'Supergem' produces large fragrant creamy-white flowers from late spring through early summer, sometimes flowering sporadically through the season.

Is 'Supergem' good for screening?

Yes. The dense compact habit makes 'Supergem' well suited to tall privacy screens and feature planting in smaller gardens.

Is 'Supergem' evergreen?

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

How far apart should I plant 'Supergem' for a screen?

Plant 2-3 metres apart for a screen, or as individual feature trees with room for the crown to develop.

Where does 'Supergem' grow best in Australia?

'Supergem' is adaptable across most Australian climates, preferring well-drained acidic soil in full sun to partial shade.

Enriched Planting Mix (AO Certified)

$21.95

Features and Benefits

Organically certified product
Improves aeration for roots
A rich blend of Pure Magic Compost, composted animal manure, Gypsum, composted coarse bark and wetting agent
Excellent to mix with heavy clay soils, an organic mixture with added gypsum which is perfect for exotic plants
Revitalises tired soils, adds nutrient and organic matter, no chemical additives, weed free
Assists in retaining moisture in the soil longer after rain or watering

Directions For Use

Water plant well at least several hours prior to planting.
Dig a hole at least twice the width of the pot and 7cm deeper than the pot.
Mix Grow Better Enriched Planting Mix with the soil that has been dug out of the hole, adding about 1/3 planting mix.
Spread a 7cm layer of improved soil in the hole and remove plant from the pot. Tease roots gently if the root ball is very firm and place plant in the planting hole. Check that pot soil is level with the surrounding soil surface level, not higher or lower.
Fill in the hole with improved soil mixture, firm down soil and water well adding Grow Better Plant Starter to final watering.

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Uses in my Garden

Feature Tree
Screening or Privacy
Shade Tree
Council or Civic Landscapes

Magnolia Grandiflora 'Supergem' 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 'Supergem' Evergreen or Deciduous?

Magnolia Grandiflora 'Supergem' is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 6m - 10m Approximately

Mature Width: 3 – 4 meters

Magnolia Grandiflora 'Supergem' is expected to grow Approx 20 – 40 cm per year (moderate).

Growth Rate of Magnolia Grandiflora 'Supergem'

Magnolia Grandiflora 'Supergem' is expected to grow Approx 20 – 40 cm per year (moderate).

They are considered to have a:

Medium Growth Rate

Frost Tolerance & Ideal Climate to plant Magnolia Grandiflora 'Supergem'

Is Magnolia Grandiflora 'Supergem' frost tolerant?

Magnolia Grandiflora 'Supergem' is Frost Tolerant – Can handle light to moderate frost once established.

Does Magnolia Grandiflora 'Supergem' Flower?

Magnolia grandiflora ‘Supergem’ produces large, creamy-white, lemon-scented flowers from late spring through summer, with intermittent blooms into early autumn. These impressive, upright cup-shaped flowers contrast beautifully with the dense, glossy green foliage and its warm bronze undersides, creating a bold and elegant seasonal display.

Does Magnolia Grandiflora 'Supergem' flower?

Yes - Flowers

Flowering Period:

Spring

Flower Type:

Fragrant

Flower Colour:

White

Is Magnolia Grandiflora 'Supergem' an Australian Native Tree?

No

Magnolia Grandiflora 'Supergem' is Native to A cultivated form of Magnolia grandiflora, which is native to the southeastern United States, particularly along the coastal plains and moist forests.

What is the Wildlife Value of Magnolia Grandiflora 'Supergem' ?

Its nectar-rich blooms attract bees, beetles and other pollinating insects, while the dense evergreen canopy provides excellent year-round shelter and nesting habitat for small birds. The seed-filled cones that follow flowering also offer food for wildlife, contributing meaningfully to garden biodiversity.

How much Sunlight does Magnolia Grandiflora 'Supergem' need?

Magnolia Grandiflora 'Supergem' will thrive best in:

Full Sun
Part Shade

Preferred Soil?

Magnolia grandiflora ‘Supergem’ performs best in well-drained, slightly acidic loam or sandy loam soils. It may struggle in heavy clay, alkaline or poorly drained ground unless improved with organic matter and coarse material to increase drainage and soil structure. Keep soil evenly moist during establishment, then shift to deep, occasional watering as the tree matures to support strong evergreen growth, healthy root development and consistent flowering.

Is Magnolia Grandiflora 'Supergem' Drought Tolerant?

Is Magnolia Grandiflora 'Supergem' Drought tolerant?

As a young tree it requires regular watering, but once established ‘Supergem’ develops good drought tolerance. It performs reliably in warm, dry and coastal settings and maintains its full, compact habit with deep, occasional watering during extended dry periods.

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How To Plant Your Magnolia Grandiflora 'Supergem'

How to Plant:

Select a location that receives full to partial sun and has well-drained, acidic soil.
Dig a hole twice as wide as the root ball and just as deep.
Carefully remove the tree from its container and place it in the hole, making sure the top of the root ball is level with the soil surface.
Backfill the hole with soil, water thoroughly, and apply a layer of mulch to help retain moisture.

Recommended Planting Spacing For Your Magnolia Grandiflora 'Supergem'

Feature Planting: Space 3 – 5 m apart to showcase full shape

Hedging & Screening: Space 2.5 – 3 m apart for structured evergreen screens

Avenue Planting: Space 4 – 5 m apart for formal layout with consistent form

Magnolia Grandiflora 'Supergem' is expected to grow Approx 20 – 40 cm per year (moderate).

Medium Growth Rate

Long Term Care For Your Magnolia Grandiflora 'Supergem'

Caring for Magnolia grandiflora 'Supergem':

Water the tree deeply to encourage root growth, especially during dry spells.
Fertilize in the spring with a slow-release fertilizer designed for trees and shrubs.
Prune after flowering to maintain shape and overall health, removing any crossed or inward-growing branches.

Planting Your Magnolia Grandiflora 'Supergem' in Different Soil

How to Grow in Different Soil Types

Magnolia 'Supergem' prefers moist, well-drained soil, but adapts to a variety of conditions:

Sandy Soil: Requires organic matter and regular watering to retain moisture.

Clay Soil: Needs improved drainage with compost and gypsum to prevent waterlogging.

Loamy Soil: Ideal for healthy root development and steady growth.

Acidic or Alkaline Soil: Prefers slightly acidic to neutral soil, but tolerates mild alkalinity.

Frequently Asked Questions

Frequently Asked Questions:

When is the best time to plant Magnolia 'Supergem'?
Planting in early spring or fall allows the tree to establish itself during moderate temperatures.
How often should I water my Supergem Southern Magnolia?
Water regularly, especially during the first few years; once established, the tree will be more drought-resistant.
Is Magnolia 'Supergem' prone to any pests or diseases?
While it is generally hardy, it can sometimes face issues with scale insects or fungal diseases. Proper care usually keeps these problems at bay.
Can 'Supergem' be grown in a pot?
Yes, its moderate size makes it suitable for large container planting, provided it has enough room to grow.
What makes 'Supergem' different from other Magnolia grandiflora cultivars?
Its compact growth, abundant flowering, and evergreen nature make it a standout choice for gardens where space is a consideration without sacrificing the dramatic impact of magnolias.