How to Grow Ohia Lehua
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Ohia Lehua
Metrosideros polymorpha
treeOhia lehua is a native Hawaiian tree known for its striking crimson, orange, or occasionally yellow pom-pom-like flowers. It is a highly adaptable species that dominates Hawaiian forests from sea level to high elevations and plays a critical role in native ecosystems. The tree is culturally significant to Hawaiian people and is also valued for its hard, durable wood and ornamental qualities.
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Example Ohia Lehua timeline · Pittsburgh, PA (Zone 6b)
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Plant Ohia Lehua
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 Ohia Lehua
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 10b-12; best in warm, tropical climates with adequate moisture
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Get my Ohia Lehua timeline →Growth Stages
Seedling
4-8 weeksTiny seedlings with oval cotyledons and initial true leaves appearing; very delicate and slow-growing
Keep soil consistently moist but not waterlogged. Provide bright, indirect light. Protect from direct sun stress. Use well-draining seed-starting mix.
Early Growth
3-6 monthsYoung plants developing more robust foliage; leaves become increasingly prominent and the stem strengthens
Gradually acclimate to brighter light. Maintain consistent moisture. Begin light feeding with diluted balanced fertilizer every 2-3 weeks.
Juvenile
1-2 yearsEstablished young tree with dense foliage; branching structure developing; plant reaches 1-3 feet tall
Water during dry periods but allow soil surface to dry between waterings once established. Prune lightly to shape if desired. Fertilize monthly during growing season.
Maturing
1-3 yearsTree grows larger with more substantial branching; flowering may initiate; height 6-15+ feet depending on variety and conditions
Reduce watering frequency; tree is now drought-tolerant. Prune to maintain desired shape. Watch for pests and diseases. Fertilize sparingly once established.
Flowering & Fruiting
Blooming period 2-4 months; fruiting followsDistinctive clusters of staminate flowers in red, orange, or yellow appear at branch tips; flowers followed by woody capsules containing tiny seeds
Maintain consistent but not excessive watering during flowering. No special fertilization needed. Deadheading spent flowers is optional but encourages continued blooms.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Remove infected foliage; improve air circulation; maintain tree vigor; no chemical cure available; resistant cultivars being developed
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Maintain plant health and vigor; remove diseased branches; ensure good drainage; avoid wounding trees; quarantine affected plants
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Spray with insecticidal soap or neem oil; prune heavily infested branches; encourage natural predators
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Handpick if population is low; use row covers on young plants; spray neem oil if necessary
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Prune and destroy affected leaves; apply Bacillus thuringiensis (Bt) if severe
Uses
Striking Tropical Flowers & Landscaping
OrnamentalThe brilliant pom-pom flowers in red, orange, or yellow make ohia lehua a highly prized ornamental tree in tropical gardens. It provides year-round foliage, wildlife value, and cultural significance. [source]
Hawaiian Native Ecosystem Support
WildlifeOhia lehua is a keystone native species in Hawaiian forests that provides nectar for native Hawaiian birds, including the endangered i'iwi and apapane. It stabilizes slopes and prevents erosion. [source]
Traditional Lei Making
CraftThe flowers are traditionally used in Hawaiian lei-making and hold deep cultural significance. Fresh flowers are ideal for immediate use in floral arrangements. [source]
Durable Wood & Timber
HouseholdOhia wood is extremely hard and durable, traditionally used for Hawaiian canoe building, spears, and furniture. Modern uses include flooring and specialty crafts. [source]
Traditional Hawaiian Medicine
MedicinalVarious parts of the ohia lehua tree have been used in traditional Hawaiian medicine for treating colds, coughs, and other ailments, though scientific validation is limited. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Ohia lehua is grown primarily as an ornamental tree; seeds can be collected from mature seed capsules when they turn brown and begin to crack. Cut entire capsule and allow to dry indoors for 1-2 weeks, then tap gently to release tiny seeds. Flowers are sometimes harvested for lei-making; cut healthy flower clusters in early morning when fresh.
Fun Facts
- 🌱 Ohia lehua can grow at any elevation from sea level to nearly 10,000 feet in Hawaii, making it one of the most adaptable native Hawaiian trees.
- 🌱 According to Hawaiian legend, cutting or picking ohia lehua flowers without proper respect invokes Pele's anger and brings misfortune—yet the flowers are deeply valued in lei-making traditions.
- 🌱 The tree exhibits extreme morphological variation across different Hawaiian islands and elevations, with some forms being shrubby and others tall and tree-like, even though they are all the same species.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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