Northern Rātā
Metrosideros robusta
Northern Rātā (Metrosideros robusta) is a remarkable New Zealand tree. Learn more about native trees.
Image credit: Northern Rātā (Metrosideros robusta) – Photo via Wikipedia
| Scientific Name | Metrosideros robusta |
|---|---|
| Height | Up to 25 m (82 ft) |
| Spread | 10–15 m (33–49 ft) |
| Water Needs | Moderate |
| Light | Full sun to partial shade |
| Frost Tolerance | Moderate (protect young trees) |
| Salt Tolerance | Low to moderate |
| Growth Rate | Slow to moderate |
| Lifespan | Centuries |
Climate Suitability
| City | Suitability |
|---|---|
| Whangārei | Suitable |
| Auckland | Suitable |
| Hamilton | Suitable |
| Tauranga | Suitable |
| Rotorua | Suitable |
| Gisborne | Suitable |
| New Plymouth | Suitable |
| Napier | Suitable |
| Whanganui | Suitable |
| Palmerston North | Suitable |
| Wellington | Suitable |
| Nelson | Suitable |
| Christchurch | Suitable |
| Dunedin | Suitable |
| Invercargill | Suitable |
Metrosideros robusta, the northern rātā, is found in forests throughout the North and South Islands and adapts well to a range of climates.
- Thrives in deep, fertile, moist soils with good drainage.
- Prefers full sun but tolerates partial shade.
- Water regularly during establishment; mulch to retain moisture.
- Protect young trees from strong winds and frost.
- Iconic forest canopy tree, providing habitat for native birds and insects.
- Used in ecological restoration and reforestation projects.
- Valued for its striking red flowers and as a specimen tree in large gardens and parks.
Spring
- New growth and flower buds appear; apply mulch and water as needed.
Summer
- Peak flowering; water during dry spells.
Autumn
- Collect seed; tidy fallen leaves and mulch base.
Winter
- Minimal growth; protect young trees from frost.
Minimal pruning required. Remove dead, damaged, or crossing branches after flowering. Shape young trees to encourage a strong framework.
- Choose a sheltered, sunny site with deep, fertile soil.
- Dig a hole twice as wide as the root ball.
- Mix compost into the soil.
- Plant at the same depth as in the nursery container.
- Backfill, firm gently, and water well.
- Mulch to retain moisture and suppress weeds.
From Seed
Collect ripe seed capsules after flowering. Sow fresh seed on the surface of a moist, well-draining mix. Do not cover seed. Keep in a warm, bright spot. Germination usually occurs within a few weeks.
From Cuttings
Take semi-hardwood cuttings in late summer. Dip in rooting hormone and place in a free-draining mix. Keep humid until roots develop.
Northern Rātā is significant in Māori tradition, often associated with forest guardianship and used as a source of timber. The tree is celebrated for its spectacular flowering and is a symbol of strength and resilience in New Zealand forests.
- Generally hardy, but susceptible to possum browsing, which can severely damage foliage and flowers.
- Watch for scale insects and myrtle rust, especially in humid conditions.
- Root rot may occur in poorly drained soils—ensure good drainage and avoid overwatering.
Bonus Tip
Plant Northern Rātā with other native canopy trees to create a diverse, resilient forest ecosystem. Mulch well and water during dry periods for best establishment.
