Name: The Plant Company
Address: 284 Meeanee Road, Meeanee, Napier, 4112, New Zealand
Telephone: 0800 843 752
Price range: Contact Us
Rating: 4.8/5

silver flax

Silver flax is a striking native plant treasured in New Zealand gardens for its shimmering foliage and architectural form. With its elegant, silvery leaves, silver flax offers both visual impact and versatility, making it a favourite for landscaping, container plantings, and low-maintenance gardens. This resilient species stands out in coastal gardens, urban landscapes, and as a dramatic feature in mixed borders. If you're searching for a plant that combines beauty, adaptability, and Kiwi flair, silver flax is an excellent choice.

Isolepis cernua (Fiber-Optic Grass)

Isolepsis cernua (aka Scirpus cernua), commonly known as Fiber Optic Grass, grows as a tidy clump to about 25 cm tall and the same wide with green foliage and interesting silver flower heads. Isolepsis cernua is commonly planted alongside a pond or stream, planted around outdoor living areas, mass planted on a bank, or maintained in a container.

Buy Isolepis cernua (Fiber-Optic Grass)

From $16.13

Suited to regions: Subtropical, Temperate

Plant type: Grasses

Height: 25 cm

Spread: 25 cm

Flowering time: Summer

Tolerances: Hardy, Wet, Wind

Garden uses: Banks, Borders, Containers, Living areas, Parks, Paths & Steps, Patios, Ponds, Pool areas, Specimen

Garden styles: Architectural, Backyard, City & Courtyard, Frontyard, Japanese, Modern, Riparian

Dianella 'Revelation'

Dianella 'Revelation' features flower stems that rise above the foliage through spring and summer to bear masses of delicate, blue flowers, which result in blue berries. This NZ Flax Lily features narrow, grass-like foliage that is dark green and held densely, growing to 60 cm tall and the same width. Dianella 'Revelation' is commonly mass-planted either as a groundcover or on a bank, included in borders or mixed plantings, planted around the base of large trees, grown around water features such as streams and ponds, or featured in cottage gardens.

Buy Dianella 'Revelation'

From $16.13

Suited to regions: All regions

Plant type: Flaxes

Height: 60 cm

Spread: 60 cm

Flowering time: Spring, Summer

Tolerances: Coastal, Extended dry periods, Hardy

Garden uses: Borders, Containers, Living areas, Paths & Steps, Ponds, Pool areas

Garden styles: Backyard, City & Courtyard, Coastal, Frontyard, Modern

What is Silver Flax?

Silver flax, often used to describe certain cultivars of New Zealand flax (Phormium) with silvery-grey leaves, brings a unique colour and texture to the garden. Its upright, sword-shaped foliage adds both height and movement, reflecting sunlight and making borders shine. Adapted to a wide range of conditions, silver flax is hardy, drought-tolerant, and thrives in both full sun and partial shade. Whether used as a stand-alone specimen or in mass plantings, silver flax helps create a modern, coastal, or native-inspired look.

Uses in the Garden

Silver flax delivers multiple benefits for Kiwi gardens. Its colour and form offer year-round interest, making it a reliable option for structure and contrast. It’s ideal for:

Coastal gardens, thanks to its salt tolerance
Contemporary plantings, where sleek, silvery foliage pairs perfectly with minimalist designs
Native gardens, blending seamlessly with other NZ species
Erosion control on slopes or banks
Container gardens, where its architectural appeal shines

For gardeners wanting to mix different textures, consider pairing silver flax with other native flaxes like Astelia fragrans (Bush Flax), or with striking foliage plants such as Dianella 'Revelation' and Phormium 'Surfer Bronze'. These combinations bring layers of colour and visual interest.

Plant Care and Growing Tips

Silver flax is appreciated for its low-maintenance nature. It grows best in well-drained soils and enjoys regular watering until established. Once mature, it tolerates dry spells and needs little intervention. An occasional tidy-up—removing older leaves and spent flower stems—keeps plants looking fresh. Fertilising in spring, especially in containers, supports healthy growth and vibrant foliage. In colder zones, silver flax tolerates light frost, but mulching in winter is recommended.

Companion Plants for Silver Flax

Enhance your planting scheme by pairing silver flax with other foliage and grass-like plants. Native grasses such as Isolepis cernua (Fiber-Optic Grass) add playful texture, while broad-leaved indoor plants like Aglaonema Silver Queen (Silver Queen Plant ) echo silvery hues for a stylish transition from outdoor beds to shaded patios. For extra drama and durability, combine silver flax with landscape favourites like Phormium 'Surfer Bronze'.

Why Choose Silver Flax?

Choosing silver flax means investing in a hardy, visually captivating plant that embodies New Zealand’s natural beauty. Its striking foliage transforms gardens year-round while offering practical benefits like low upkeep and resilience. Whether used as a statement feature or in mixed native plantings, silver flax is a timeless addition to any Kiwi landscape.

Explore our range of native flaxes and companion plants to inspire your next garden project.

Contact us

Whether you need assistance finding the plant you’re looking for or you simply want to know more about who we are and what we do, we invite you to get in touch with us today. A member of The Plant Company team will get back in touch as soon as possible.