Red Phormium
Phormium tenax 'Rubra'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
7, 8, 9
Water
Moderate, adaptable to drought
Humidity
Average garden humidity
Lifespan
10+ years
Native To
New Zealand
Toxicity
Yes (to pets and humans if ingested)
The Story
Plant Bio
Phormium tenax, commonly known as New Zealand flax, is an evergreen perennial with long, sword-shaped leaves that form dense clumps, producing striking, tall flower spikes with reddish-brown flowers. The 'Rubra' cultivar is distinguished by its vibrant reddish-purple leaf margins, adding a dramatic splash of color to the foliage and making it a striking focal point in garden landscapes.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck root ball into a prepared planting hole.
- Water thoroughly after planting to settle soil.
- Mulch around base to retain moisture.
- Fertilize with a balanced fertilizer in early spring.
- Prune dead or damaged leaves in early spring.
- Protect from cold winds in winter.
Pro Tip
Plant in well-drained soil with full sun for best color and growth.
Keep It Thriving
Care Guide
Do
- Water regularly during dry periods 🌱
- Fertilize annually with a balanced feed
- Prune dead leaves to maintain shape
Don't
- Avoid overwatering to prevent root rot ❌
- Do not plant in poorly drained soil
- Avoid heavy pruning in late fall
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Spring Cleanup | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Red Phormium questions
What zones can Red Phormium grow in?
Red Phormium is hardy in USDA Zones 7–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Red Phormium deer resistant?
Yes — Red Phormium is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Red Phormium bloom?
Red Phormium typically blooms in late summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Red Phormium need full sun?
Red Phormium does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Red Phormium drought tolerant?
Yes — once established (usually after the first full season), Red Phormium handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Red Phormium with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
