Phormium ‘Platt’s Black’

(New Zealand Flax)

By August 24, 2025
Upright grass-like dark brown leaves planted in a landscape accompanied by lime green plants in the background

About Phormium ‘Platt’s Black’ (New Zealand Flax)

This highly unusual colored plant is called Phormium ‘Platt’s Black’. With arching, strap-like, glossy foliage ranging in colors from chocolate brown to burgundy, this evergreen cultivar of New Zealand Flax is a striking contrast against a landscape’s typical range of colors. With a clumping habit and upright growing leaves, this variety reaches an average mature landscape size of 3-4′ tall by 2-3′ spread. During the summer months leafless stalks emerge with red tubular flowers. More profuse flowering occurs in more established plants while under certain conditions, flowers can give way to twisted seed capsules.

Origins And Landscape Adaptability

Just as its common name implies, New Zealand Flax, this variety originates from New Zealand. This Flax variety has excellent adaptability to coastal conditions and windy environments. In some cases it has shown to be a deterrent for wildlife such as rabbits or deer. Once established, it tolerates drought conditions and has shown to be resistant to common plant pests and diseases.

Care And Planting Instructions

Plant Phormium ‘Platt’s Black’ in an area that receives full sun to partial shade using well-draining soil. Water regularly after planting to help it establish well to its new location. After the first few growing seasons, this plant is tolerant to drought conditions. For a cleaned up appearance cut back dead leaves and if desired, divide plants during the spring season.

Landscape Design Ideas

New Zealand Flax offers a contemporary look to landscape designs. It can be used as a border, an accent, a focal plant or planted in containers. Its excellent adaptability to different landscape conditions makes it a great option for any landscape design.


Botanical Name: Phormium 'Platt's Black'

Common Name: New Zealand Flax

Average Landscape Size: 3-4' x 2-3'

Plant Type: Evergreen

Bloom Color: Red

Foliage Color: Chocolate Brown

Forms: Shrub

Sizes: 5 Gallon

Special Features: Deer Deterrent, Drought Tolerant, Easy Pruning, Good For Container Or Ground Planting, Good For Mass Plantings, Low Maintenance, Waterwise, Year-round Interest,