Southern Rata (Metrosideros umbellata)

Southern Rata

Metrosideros umbellata

Its crimson blooms cluster like fiery umbels against evergreen foliage. Evergreen tree; common name: Southern Rata.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates coastal wind exposure for mature specimens
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Watering Water deeply but infrequently; drought-tolerant once established in native habitats
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Temperature Hardy to mild frosts; prefers cool temperate climates; avoid prolonged heat above 28°C
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Characteristics

  • Leaf: Small, leathery oval leaves with glossy dark green upper surfaces and pale, fuzzy undersides
  • Flower: Dense umbels of bright crimson brush-like flowers with numerous prominent stamens
  • Stem: Juvenile stems are woody and climbing; mature trees develop thick, gnarled trunks
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Care Guide

Watering

Water regularly during dry spells to support flowering and juvenile growth

Fertilization

Apply slow-release balanced fertilizer once to support new growth. Use low-phosphorus fertilizer to support flowering without damaging root systems

Composted banana peel tea:Use fully composted banana peels, dilute 1:20 with water for root drenching; avoid raw peels to prevent pest infestations
Pruning
  • Prune juvenile climbing stems to control growth on host trees and prevent overcrowding
  • Remove dead or damaged branches in late winter to maintain tree shape and improve airflow
  • Thin crowded inner branches to increase light penetration for better flowering
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Not listed as toxic to cats by the ASPCA

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: Sacred to Māori culture, associated with native forest ecosystems and spiritual connections to the land

Usage: Ornamental coastal tree; nectar source for native birds including tūī and bellbirds