Magnolia Grandiflora 'Supergem'

Magnolia grandiflora 'Supergem' is a compact and elegant Southern Magnolia cultivar, prized for its smaller size and lush, dark green foliage with velvety bronze undersides. Growing 6–8 meters tall and 3–4 meters wide, it fits well in landscapes where space is limited but impact is desired.

This evergreen tree produces large, fragrant creamy-white flowers, 20–25 cm across, from late spring through early summer, sometimes blooming sporadically throughout the season. It features a pyramidal to rounded crown with dense branching, making it ideal as a specimen tree or privacy screen.

'Supergem' thrives in well-drained, acidic soils, tolerates urban pollution, and is moderately drought-tolerant once established. Preferring full sun to partial shade, it requires minimal pruning after flowering to maintain shape.

A perfect choice for adding classic magnolia beauty and resilience to smaller gardens or formal landscapes.

Common Name: Supergem Southern Magnolia

Genus: Magnolia

Botanical Species: grandiflora

Family: Magnoliaceae

Botanical Name: Magnolia grandiflora 'Supergem'

• 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.

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

Mature Height: 6m - 10m Approximately

Mature Width: 3 – 4 meters

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

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

They are considered to have a:

• Medium Growth Rate

Is Magnolia Grandiflora 'Supergem' frost tolerant?

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

• Subtropical QLD (Brisbane, Gold Coast, Sunshine Coast)
• Inland QLD (Darling Downs, Central QLD)
• 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

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

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.

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.

Magnolia Grandiflora 'Supergem' will thrive best in:

• Full Sun
• Part Shade

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?

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.