Phormium tenax 'Bronze Baby' (Bronze Baby New Zealand Flax) — Perennial

Overview

Phormium tenax 'Bronze Baby' is a perennial in the genus Phormium, part of the Asphodelaceae family, with evergreen foliage. It typically grows around 3.0 m tall. Phormium tenax 'Bronze Baby' grows best in full sun, and tolerates most soils. Its UK hardiness is rated H4. Suggested uses include borders, containers and ornamental foliage. It is native to New Zealand.

About the genus

Phormium is a genus of two plant species in the family Asphodelaceae. One species is endemic to New Zealand and the other is native to New Zealand and Norfolk Island. The two species are widely known in New Zealand as flax or their Māori names wharariki and harakeke respectively, and elsewhere as New Zealand flax or flax lily, but they are not closely related to the Northern Hemisphere's flax, which is native to the region extending from the eastern Mediterranean to India and has been used by humans since 30,000 B.C.

Wikipedia contributors, "Phormium", CC BY-SA 4.0 — Phormium

In the garden

Phormium tenax 'Bronze Baby' is a perennial member of the Asphodelaceae, native to New Zealand, grown for its long, strap-like evergreen leaves and summer flowering. Plants form a robust clump that can reach about 3.0 m in height and will produce conspicuous flowering shoots in the summer months (June to August). Place Bronze Baby New Zealand Flax in full sun where possible; it also tolerates exposure on an open site. It grows well across a range of soils — sandy, loamy and clay — provided conditions are moist but well drained, and it will tolerate wetter ground than many ornamentals. In UK hardiness terms it is H4 (average), so it survives typical garden winters in much of Britain; USDA zones 8–10 offer a comparable reference for milder climates. Use this Phormium in mixed borders where its vertical leaves provide structure, in large containers for patios and terraces, or focused as an ornamental foliage specimen. The summer flower spikes lift above the foliage between June and August and add temporary height, after which the bold leaves remain the season-long feature.

Growing conditions

Best soil and position for Phormium

Sunlight: Full sun
Soil type: Sandy, Loamy, Clay
Soil moisture: Moist but well-drained, Wet
Exposure: Full sun
UK hardiness: H4

Plant details

Phormium tenax 'Bronze Baby' size, habit and characteristics

Plant type: Perennial
Foliage: Evergreen
Height: 3.0 m
Suggested uses: Borders, Containers, Ornamental foliage
Native to: New Zealand

Care notes

Pruning and caring for Phormium tenax 'Bronze Baby'

Cultivation: Prefers moist but well-drained soil; tolerates wet conditions; plant in full sun for best foliage color
Pruning: Remove old or damaged leaves to maintain appearance
Propagation: Division of clumps in spring or autumn

Frequently asked questions

How do I grow Phormium tenax 'Bronze Baby'?

Prefers moist but well-drained soil; tolerates wet conditions; plant in full sun for best foliage color.

Where is the best place to plant Phormium tenax 'Bronze Baby'?

Phormium tenax 'Bronze Baby' prefers full sun. It suits full sun positions.

What soil does Phormium tenax 'Bronze Baby' need?

Phormium tenax 'Bronze Baby' is adaptable and grows happily in most soil types, including sandy, loamy and clay. Aim for soil that stays moist but well-drained to wet.

How do I prune Phormium tenax 'Bronze Baby'?

Remove old or damaged leaves to maintain appearance.

How big does Phormium tenax 'Bronze Baby' grow?

Phormium tenax 'Bronze Baby' reaches a height of 3.0 m.

Is Phormium tenax 'Bronze Baby' hardy in the UK?

Phormium tenax 'Bronze Baby' has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.