Phormium tenax var. platts black · Asphodelaceae

New Zealand Flax

✅ Pet-friendlyPerennial, remaining green throughout the year.60 to 120 cm

LightFull sun

WaterModerate watering; allow soil to dry between waterings.

DifficultyEasy

ColdWithstands light frosts down to minus 5 degrees Celsius.

Full sunModerate watering; allow soil to dry between waterings.EasyWithstands light frosts down to minus 5 degrees Celsius.

Description & origin

New Zealand Flax is a perennial plant with long, narrow, dark purple leaves. Ideal for modern and contemporary gardens, it offers a striking contrast with other plants. Hardy and easy to maintain, it adapts well to different climatic conditions.

Size

Can reach up to 120 cm in height and 90 cm in width.

Foliage

Evergreen foliage that maintains color year-round.

Flowering

This species does not produce flowers in domestic cultivation.

Detailed care

Light

Prefers full sun for optimal growth.

Soil

Well-drained soil, rich in organic matter.

Watering

Moderate watering, allowing the soil to dry slightly between waterings.

Temperature

Tolerates cold well but prefers temperate climates.

Fertilising

Fertilize in spring with a balanced fertilizer.

Repotting

Transplant in spring if necessary, ensuring enough space for growth.

Pruning

Remove dry or damaged leaves to keep the plant healthy.

Propagation

Propagates by division in spring.

Common problems

Root rot

Occurs in poorly drained soils. Improve soil drainage.

Yellowing leaves

May indicate overwatering. Adjust watering frequency.

Snail damage

Snails can damage leaves. Use baits or physical barriers.

Uses & curiosities

In the garden

Borders
Contemporary gardens
Low-maintenance gardens

Other uses

Ideal for creating visual contrasts in landscaping.

Did you know…

This plant is native to New Zealand and has been traditionally used by the Maori for weaving.