How to Grow Native ohia
Native ohia
Metrosideros polymorpha
treeNative ohia is Hawaii's most iconic native tree and the dominant species in native Hawaiian forests. It produces brilliant crimson, orange, yellow, or pink flowers and can grow from sea level to over 9,000 feet elevation. This hardy, long-lived tree is culturally significant to Hawaiian people and provides essential habitat for native birds and insects.
When should you plant Native ohia in your zone?
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Example Native ohia timeline · Pittsburgh, PA (Zone 6b)
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Plant Native ohia
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Native ohia
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Native ohia dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10b-12, tolerant of coastal to high-elevation tropical climates
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Get my Native ohia timeline →Growth Stages
Seed & Germination
2-4 weeksTiny seeds germinate within 2-4 weeks under warm, moist conditions; seedlings develop first true leaves
Keep soil consistently moist but not waterlogged; provide warm temperatures (70-80°F); use seed-starting mix; provide bright light
Seedling
2-3 monthsYoung plants develop 2-4 true leaves and establish a small root system; growth is initially slow
Maintain moderate moisture; provide bright indirect light; begin occasional fertilizing; protect from direct harsh sun
Juvenile
1-3 yearsPlant grows taller with increasing branching; develops thicker stem and more extensive foliage; no flowers yet
Water regularly during dry periods; fertilize monthly with balanced slow-release fertilizer; stake if needed in windy locations; prune to shape
Flowering
Peak blooming in spring/summer; can bloom year-round in ideal conditionsTree produces dense clusters of striking brush-like flowers in crimson, orange, yellow, or pink; flowers are rich in nectar
Reduce nitrogen fertilizer to encourage blooming; maintain adequate water during flowering; flowers attract native birds; deadhead spent blooms to promote continuous flowering
Mature & Established
Ongoing; 50+ yearsTree reaches full size (20-40 feet typically); develops thick bark and gnarled form; flowers prolifically; requires minimal maintenance
Water during extended droughts; no fertilizer needed once established; minimal pruning needed; monitor for pests; extremely long-lived (100+ years)
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Select disease-resistant cultivars when available; ensure good air circulation; remove infected leaves; avoid overhead watering; no chemical cure available; quarantine infected plants
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Prune heavily infested branches; apply horticultural oil spray; encourage natural predators; monitor regularly
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Spray with insecticidal soap or horticultural oil; remove infested branches; maintain plant vigor
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Improve air circulation; avoid wetting foliage; remove affected leaves; apply fungicide if severe
Uses
Native Hawaiian Bird Habitat
WildlifeOhia flowers are the primary nectar source for endangered Hawaiian native honeycreepers including the ʻapapane and amakihi. The tree provides essential food and nesting habitat for these and other endemic Hawaiian birds. [source]
Ecological Restoration
HouseholdNative ohia is the key species for restoring Hawaiian forests and native ecosystems. It dominates native forest communities from lowland to subalpine zones and is essential for watershed protection and biodiversity conservation. [source]
Cultural & Spiritual Significance
CraftOhia is deeply sacred in Hawaiian culture and mythology, associated with Pele and traditional Hawaiian practices. Wood is traditionally used for lei, hula implements, and other cultural items. [source]
ʻŌhelo Berry Companion
CulinaryWhile ohia flowers are not directly consumed, ohia trees naturally grow with ʻōhelo berry (Vaccinium reticulatum), a native Hawaiian fruit historically important to Hawaiian diet and culture. [source]
Traditional Hawaiian Medicine
MedicinalOhia bark and flowers have been used in traditional Hawaiian medicine for various purposes. The tree's ecological role supports overall ecosystem health. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
No harvest in traditional sense. Seeds mature in small woody capsules 6-9 months after flowering; collect seed pods when brown and dry; extract tiny seeds by opening capsules; seeds can be stored dry in cool conditions
Fun Facts
- 🌱 Metrosideros polymorpha is so named because it is highly polymorphic—the same species can vary dramatically in flower color (red, orange, yellow, pink, or white), leaf size, and growth form depending on elevation and environment.
- 🌱 Ohia can grow at elevations from sea level to 9,400 feet in Hawaiʻi, making it the most dominant native tree across the broadest elevational range in the Hawaiian Islands.
- 🌱 The tree's wood is extremely hard and dense, making it historically valuable for lei (garlands) and Hawaiian implements, though modern conservation focuses on preserving living trees for their ecological role.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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