How to Grow ʻŌhiʻa lehua
ʻŌhiʻa lehua
Metrosideros polymorpha
treeʻŌhiʻa lehua is an endemic Hawaiian tree famous for its brilliant crimson, pink, or rarely yellow bottlebrush-like flowers that bloom in clusters. It is a keystone species in Hawaiian ecosystems, ranging from sea level to the highest elevations, and can grow as a small shrub or a large canopy tree depending on environmental conditions. The tree produces hard wood highly valued in Hawaiian culture and is critical for native forest health and watershed protection.
When should you plant ʻŌhiʻa lehua in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example ʻŌhiʻa lehua timeline · Pittsburgh, PA (Zone 6b)
-
Plant ʻŌhiʻa lehua
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest ʻŌhiʻa lehua
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact ʻŌhiʻa lehua dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 10-11; best in warm, humid Hawaiian climates and frost-free regions
Sign up free to see if ʻŌhiʻa lehua grows in your zone — and get a personalized planting timeline.
Get my ʻŌhiʻa lehua timeline →Growth Stages
Seedling
4-8 weeksTiny seeds germinate into small seedlings with delicate true leaves. Growth is initially slow and requires protection from direct sun and drying winds.
Keep soil consistently moist but not waterlogged. Provide 50% shade cloth. Protect from wind. Use well-draining seed-starting mix. Maintain temperatures 65-75°F for optimal germination.
Juvenile growth
6-12 monthsYoung plants develop a stronger root system and produce multiple stems. Leaves darken and become more robust. Growth remains moderate.
Gradually acclimate to full sun over several weeks. Water regularly during dry spells. Mulch around base to retain moisture and moderate soil temperature. Begin light pruning to encourage branching.
Established growth
2-5 yearsPlant develops a sturdy trunk and expanding canopy. Foliage becomes dense and glossy. Plants may reach 15-30 feet depending on conditions.
Reduce watering frequency as root system deepens. Apply mulch ring but keep away from trunk. Prune only to remove dead or crossing branches. Monitor for pests and disease.
Flowering & reproduction
Flowers appear in spring to early summer; blooming lasts several weeksMature trees (typically 3-8 years old) produce abundant bottlebrush flowers in clusters, typically scarlet but sometimes pink, orange, or yellow. Flowers attract native Hawaiian birds.
Maintain consistent watering during flowering season to support bloom production. Ensure adequate sunlight exposure. Do not over-fertilize, which reduces flowering. Hand-pollinate flowers if cultivating in non-native range.
Fruiting & seed production
4-6 months from flower to mature seedAfter pollination, small woody capsules develop containing numerous tiny seeds. Seed maturation takes several months.
Collect seed capsules after they dry and split on the tree (August-October in native range). Allow capsules to fully dry before extracting seeds. Store seeds in cool, dry conditions.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
No proven cure; prevention is key. Use sterilized tools when pruning. Do not move infected wood. Support tree vigor through proper care. Report suspected infections to HDOA. Purchase only from disease-tested nurseries.
-
Spray with insecticidal soap or horticultural oil in early morning. Monitor regularly. Prune heavily infested branches. Encourage natural predators.
-
Maintain tree health and vigor. Use insecticidal soap for severe infestations. Spray in evening to avoid harming beneficial insects.
-
Control underlying scale or psyllid populations. Spray affected foliage with water and mild soap solution. Prune heavily affected branches.
Uses
Sacred Hawaiian tree and traditional wood
CulturalʻŌhiʻa lehua holds deep spiritual significance in Hawaiian culture and was traditionally used to create lei and kahili (feather standards). The hard, durable wood was traditionally crafted into tools, weapons, and canoe components. The tree remains central to Hawaiian identity and ecosystem restoration efforts. [source]
Nectar source for native Hawaiian birds
WildlifeThe abundant crimson flowers are a primary food source for endemic Hawaiian honeycreepers including the ʻIʻiwi (Vestiaria coccinea) and ʻApapane (Himatione sanguinea). The tree is essential for native forest ecosystem health and bird survival. [source]
Lehua flowers for lei and floral arrangements
HouseholdThe striking bottlebrush flowers are traditionally used to create lei and remain popular in Hawaiian floral arrangements and ceremonies. Fresh flowers can last several days in water. [source]
Watershed and forest restoration
EcologicalʻŌhiʻa lehua is a keystone species in Hawaiian forests, stabilizing soil, retaining water, and creating habitat for native species. Restoration efforts throughout Hawaii prioritize planting native ʻŌhiʻa to combat invasive species and restore ecosystem function. [source]
Traditional Hawaiian medicine
MedicinalVarious parts of ʻŌhiʻa lehua have been used in traditional Hawaiian medicine ('lāʻau lāpaʻau). Modern research is exploring compounds and applications, though scientific evidence remains 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
Collect seed capsules when they turn brown and begin to split naturally on the tree, typically August-October in native Hawaiian range. Cut off entire capsule clusters and place in paper bag to dry completely indoors. Once fully dry, capsules will release seeds. Viable seeds are tiny and black. Store in cool, dry conditions in sealed containers; seeds remain viable for several months to over a year with proper storage.
Fun Facts
- 🌱 ʻŌhiʻa lehua exhibits remarkable polymorphism—the same species grows as a low shrub on windswept lava flows, a medium tree in wet forests, and a towering 60+ foot canopy tree in optimal conditions.
- 🌱 The tree is the first native plant to colonize new lava flows in Hawaii, making it a pioneer species crucial for ecosystem succession and soil formation.
- 🌱 In Hawaiian legend, the ʻŌhiʻa lehua tree is sacred to Pele, the volcano goddess; there is a tradition that picking lehua flowers without offering can anger Pele and bring rain or bad luck.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized ʻŌhiʻa lehua planting timeline
Tell us your zip code and we'll calculate exactly when to start ʻŌhiʻa lehua seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my ʻŌhiʻa lehua timeline →