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PHORMIUM
Commonly known as New Zealand flax
These architectural plants can be grown in tubs and make excellent features on the patio. They prefer a hot dry site and are perfectly hardy if sheltered from strong winds. In colder areas they need to be given some mulch or other protection around the base of the plant in winter.
Genus of two species of evergreen perennials P. cookianum (Mountain flax) and P. tenax (New Zealand flax).
They are found in scrub and swamps and on hillsides and riverbanks in areas ranging from coasts to mountains in New Zealand.
The flax label originates from the Cook expedition where the native popuation wore garments similar to linens (made from flax).
An industry was proposed for the Scillies in the late 1800s, probably for rope, but nothing came of it. Naturalised plants of P. tenax can be found all over the Isles.
Plant Details
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Architectural interest
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Good to know
P. cookianum subsp. hookeri 'Cream Delight'. All-year-round colour and flower spikes in summer -
Pests & Diseases
Mealybugs. -
Place of origin
Garden origin. -
Resistant to honey fungusThese plants have little or few problems with honey fungus.
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Evergreen
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Fully hardy
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Entire
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Linear
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Height
1.5m (5ft) -
Spread
75cm (30in) -
Medium shrubTypically grow to around 4-6 feet in heightClump-forming perennial.
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Hardy - average winter
Hardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F) -
Autumn Seasonal Interest
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Spring Seasonal Interest
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Summer Seasonal Interest
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Winter Seasonal Interest
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Rabbit Resistant
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Mature Size1.5m (5ft)
75cm (30in)
Planting Tips and Care Advice
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Garden Location/Conditions
Australian / New ZealandBorderSuitable for a shrub borderCoastal / windsweptIdeal for a coastal garden
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Soil Conditions
Fertile moist well-drained soil
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Sun Requirements
Full sun
For best leaf colour.Partial shade
Tolerates partial shade.
Phormiums - Care Guide