Phormium ‘Black Rage’ (New Zealand Flax)
Phormium ‘Black Rage’ is a striking evergreen foliage plant known for its dramatic, deep burgundy to near-black leaves. A compact cultivar of New Zealand Flax, it is widely used in contemporary landscapes for its bold colour and strong architectural form.
The plant produces upright, sword-like leaves that form a dense clump. The foliage is narrow and arching, with rich dark tones that intensify in full sun. Its structural shape and colour provide strong contrast against lighter plantings and hardscape materials.
Key Features
‘Black Rage’ is valued for its intense foliage colour and compact size. It delivers a strong visual impact while remaining manageable in a variety of garden settings.
It is highly durable and tolerant of a range of environmental conditions, including wind and coastal exposure. Its bold form makes it suitable as a feature plant or for mass planting.
Growth Habit and Size
This variety forms a tight, clumping plant with upright, arching leaves.
It typically reaches around 0.8 to 1.2 metres in height, with a spread of approximately 0.8 to 1 metre. Growth rate is moderate.
Care Requirements
Light
Performs best in full sun, which enhances the depth of its dark foliage colour. It can tolerate partial shade, though colour intensity may reduce.
Watering
Requires regular watering during establishment. Once established, it is moderately drought tolerant.
Water occasionally, with increased frequency during prolonged dry periods.
Soil
Prefers well-draining soil and is adaptable to a range of soil types.
Temperature and Climate
Suitable for temperate, coastal, and mild climates. It tolerates wind, salt exposure, and light frost.
Maintenance
Low maintenance. Remove older or damaged leaves at the base to maintain appearance.
Minimal pruning is required.
Fertilising is generally not essential but can support growth in poor soils.
Common Issues
Generally very hardy.
Overwatering or poor drainage may lead to root issues.
Reduced colour intensity may occur in low light conditions.
Applications
Phormium ‘Black Rage’ is suitable for:
Feature planting
Mass planting
Modern and architectural landscapes
Coastal gardens
Containers and planters
Borders and structured garden design
Its bold colour makes it ideal for contrast planting.
Specification and Care Chart
| Attribute |
Details |
| Botanical Name |
Phormium tenax ‘Black Rage’ |
| Common Name |
Black Rage New Zealand Flax |
| Plant Type |
Evergreen perennial |
| Mature Height |
0.8 m to 1.2 m |
| Growth Habit |
Clumping, upright |
| Growth Rate |
Moderate |
| Light Conditions |
Full sun to partial shade |
| Direct Sunlight |
Preferred |
| Watering Frequency |
Low to moderate once established |
| Soil Type |
Well-draining, adaptable |
| Drainage Requirement |
Essential |
| Temperature Range |
Temperate to coastal |
| Frost Tolerance |
Light frost |
| Drought Tolerance |
Moderate |
| Maintenance Level |
Low |
| Fertiliser |
Optional |
| Toxicity |
Not commonly regarded as toxic |
FAQ – Phormium ‘Black Rage’
Does it need full sun?
Full sun is ideal for best colour, though it tolerates partial shade.
How often should it be watered?
Regular watering during establishment, then occasional watering once established.
Is it suitable for coastal areas?
Yes, it tolerates wind and salt exposure well.
How big does it grow?
Typically reaches 0.8 to 1.2 metres in height.
Is it low maintenance?
Yes, it requires minimal care once established.
Can it be grown in pots?
Yes, it performs well in containers with good drainage.
