top of page

Phormium cookianum, commonly known as Mountain Flax or Wharariki, is a species of Phormium native to New Zealand. 



  • Growth Habit: Phormium cookianum is a clump-forming perennial with a compact growth habit. It typically reaches a height of around 1 to 2 meters and has a similar spread.
  • Leaves: The leaves of Phormium cookianum are long, strap-like, and rigid. They are usually dark green, although there are cultivars available with bronze or reddish-colored leaves.
  • Flowers: This species produces tall flower spikes that can reach up to 3 meters in height. The flowers are tubular and pendulous, with shades of yellow, orange, or red, depending on the variety. The flowering period typically occurs in spring and summer.
  • Berries: After flowering, Phormium cookianum may bear small, dry capsules that contain seeds.


Growing Conditions:


  • Sunlight: Phormium cookianum prefers full sun to partial shade. It grows best in areas with ample sunlight, but it can tolerate some shade.
  • Soil: This plant thrives in well-draining soil and can grow in various soil types, including sandy, loamy, or clay soils. It can also tolerate slightly acidic to slightly alkaline soil pH levels.
  • Watering: Once established, Phormium cookianum is relatively drought-tolerant. However, regular watering during dry spells will help maintain its health and appearance.
  • Temperature: This plant is well-suited for temperate and subtropical climates. It can tolerate light frosts but may require protection in colder regions with harsh winters.
  • Maintenance: Phormium cookianum is a low-maintenance plant. Remove dead or discolored leaves as needed to maintain its appearance. After flowering, the flower spikes can be cut back to encourage new growth.


Phormium cookianum is a popular and attractive ornamental plant in gardens and landscapes. Its striking foliage and tall flower spikes make it an eye-catching focal point in mixed plantings or as a standalone feature. Additionally, its adaptability to various soil types and climates makes it a versatile choice for a wide range of garden settings. As a native New Zealand plant, it also provides habitat and food sources for local wildlife.


Phormium cookianum

Out of Stock
    bottom of page