Libertia Grandiflora
Libertia grandiflora (Libertia grandiflora)
Common Names: New Zealand Iris, Purple Flag, Libertia
Family: Iridaceae
Origin: Native to New Zealand and Australia
Plant Type: Evergreen perennial clump-forming herb
Overview:
Libertia grandiflora is an elegant, clump-forming evergreen perennial known for its sword-like foliage and striking, star-shaped flowers. This hardy and versatile plant thrives in a range of garden settings, adding architectural form and seasonal color. In spring and summer, it produces beautiful white to pale yellow flowers often tinged with purple, followed by attractive seed pods. Libertia grandiflora is ideal for borders, rock gardens, and naturalistic landscapes, offering year-round interest with low maintenance requirements.
Key Features:
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Foliage: Long, narrow, arching, grass-like green leaves forming dense clumps
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Flowers/Fruit: Showy, star-shaped white to pale yellow flowers with purple markings in spring and summer; followed by ornamental seed capsules
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Form & Habit: Upright, tufted clumps with arching foliage
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Growth Rate: Moderate
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Cultural or Ecological Value: Provides nectar for pollinators and adds architectural interest to native plantings
Mature Size:
| Attribute | Size |
|---|---|
| Height | 40 – 60 cm (foliage); up to 80 cm including flower stems |
| Spread | 40 – 60 cm |
| Form | Clump-forming, upright arching leaves |
Ideal Growing Conditions:
| Requirement | Detail |
|---|---|
| Light | Full sun to partial shade |
| Water | Moderate; prefers well-drained soils but tolerates some moisture |
| Soil | Fertile, well-drained soils; tolerates a variety of soil types |
| pH Range | Neutral to slightly acidic |
| Frost Tolerance | Hardy to moderate frost |
Landscaping and Garden Uses:
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Border and edging plantings
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Rock and alpine gardens
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Native and naturalistic garden designs
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Containers and patio pots
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Pollinator-friendly gardens
Care and Maintenance:
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Pruning: Remove old flower stalks and damaged foliage to encourage tidy growth
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Watering: Regular watering during dry spells; moderately drought tolerant once established
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Feeding: Benefit from light feeding in spring with a balanced fertilizer
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Pests and Diseases: Generally pest and disease resistant
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Additional Tips: Mulch around base to conserve moisture and suppress weeds
Fun Fact or Botanical Insight:
Libertia grandiflora is part of the iris family but is distinct for its delicate flowers and grass-like foliage. Its common name “New Zealand Iris” highlights its striking resemblance to true irises, making it a favorite in both native and exotic garden designs.
Why Choose Libertia grandiflora?
With its elegant foliage and stunning spring blooms, Libertia grandiflora offers gardeners a hardy, low-maintenance plant that adds both structure and seasonal beauty. Perfect for those seeking a native-inspired planting with architectural flair and ecological benefits.
Pot Size:
These are our standard size in 5cm square pots.
Pot Size:
Standard Pot = 7cm Square
Large Pot = 9cm Square
Extra Large Pot = 1.5L Round
Use this guide to see how many plants of your selected pot size fit into a half or full carton.
Standard Pot = 25 plants per Carton
Large Pot= 10 plants per Carton
Extra Large Pot = 5 plants per Carton
Urban- $16.55 per Carton Rural- $23.85 per Carton
Standard Pot = 50 plants per Carton
Large Pot= 25 plants per Carton
Extra Large Pot = 10 plants per Carton
Urban- $16.55 per Carton Rural- $23.85 per Carton
Product Size:
The photo next to the ruler shows an example of the plant for sale (cm's) to give an indication of the size. Please note that the photo is for reference only; the size and appearance of the plant may vary.
Please Note:
Shipping charge applies. Available for immediate dispatch only, while stocks last.
