Magnolia ‘Super Gem’ (Magnolia grandiflora ‘Super Gem’)
Magnolia ‘Super Gem’ is a compact evergreen tree prized for its dense foliage, upright form, and large, fragrant white flowers. A refined selection of Southern Magnolia, it is widely used for screening, hedging, and feature planting where a structured, lush appearance is desired.
Its relatively narrow growth and rich foliage make it ideal for modern landscapes and tighter planting spaces.
Key Specifications
Botanical name: Magnolia grandiflora ‘Super Gem’
Common name: Super Gem Magnolia
Plant type: Evergreen tree
Mature height: 6 to 8 metres
Mature width: 3 to 4 metres
Typical hedge height: 3 to 5 metres
Typical hedge width: 2 to 3 metres
Growth rate: Moderate
Time to maturity: Approximately 5 to 7 years
Growth Habit and Structure
Magnolia ‘Super Gem’ forms a dense, upright tree with a strong central leader.
Narrow to moderately spreading growth habit
Develops a full, well-branched canopy
Maintains a neat, structured appearance
Its natural shape makes it suitable for both formal hedging and standalone feature planting.
Foliage and Appearance
The foliage is a key feature, providing year-round visual interest.
Leaves are:
Large, thick, and glossy
Deep green on the upper surface
Rich brown to bronze underside
The contrasting leaf colours create depth and texture, especially when foliage moves in the wind.
Growth and Establishment
Magnolia ‘Super Gem’ establishes steadily and develops into a substantial tree over time.
Early stage:
Focuses on root development and vertical growth
2–4 years:
Noticeable increase in height and canopy density
5–7 years:
Reaches mature size with a dense, established structure
Its moderate growth allows for manageable shaping and maintenance.
Light Requirements
Performs best in full sun to partial shade.
Full sun:
Encourages dense growth and abundant flowering
Partial shade:
Maintains healthy foliage with slightly softer growth
Suitable for a wide range of garden positions.
Watering Requirements
Responds well to consistent watering during establishment.
During establishment:
Water regularly to support root development
Once established:
Water weekly or as needed depending on conditions
In warmer periods:
Additional watering supports healthy growth
Consistent moisture promotes strong performance and lush foliage.
Soil Preferences
Performs best in well-drained soil enriched with organic matter.
Suitable for:
Loam soils
Sandy soils
Improved clay soils
Adapts well to various soil types when properly prepared.
Pruning and Maintenance
Low-maintenance and easy to manage.
Minimal pruning required due to natural shape
Light shaping can maintain structure if needed
Suitable for hedging and screening
Maintains a clean, architectural form with minimal effort.
Fertilising
Benefits from regular feeding.
Apply a balanced slow-release fertiliser during the growing season
Organic mulch improves soil condition
Feeding supports healthy growth and foliage quality.
Flowering Features
Produces large, creamy-white flowers with a strong fragrance.
Flowers are:
Broad and cup-shaped
Highly fragrant
Appear during warmer months
The blooms provide a striking contrast against the dark foliage.
Spacing Guide
For hedging or screening:
Plant 2 to 3 metres apart
Closer spacing creates a denser screen
Wider spacing allows individual tree form
Landscaping Uses
Magnolia ‘Super Gem’ is ideal for:
Screening and privacy hedging
Feature trees
Formal planting designs
Driveways and avenues
Courtyards and larger gardens
Its upright form makes it suitable for structured layouts.
Longevity and Performance
A long-lasting tree that maintains structure and appearance over time.
Provides year-round greenery and seasonal flowering
Suitable for long-term landscape use
Maintains a dense, uniform canopy
Summary
Magnolia ‘Super Gem’ is an evergreen tree growing to approximately 6–8 metres tall and 3–4 metres wide. It establishes over 5–7 years, forming a dense, upright structure with glossy green leaves and bronze undersides, along with large fragrant white flowers.
Its strong form, rich foliage, and versatility make it an excellent choice for hedging, screening, and feature planting in a wide range of landscapes.
