How to Grow Lehua ʻAlani

Wikimedia Commons

Lehua ʻAlani

Metrosideros polymorpha

tree

Lehua ʻAlani is a native Hawaiian tree belonging to the Myrtaceae family, prized for its striking crimson, orange, or occasionally yellow pom-pom-like flowers that bloom primarily in summer. This iconic tree is deeply embedded in Hawaiian culture and ecology, serving as a vital food source for native birds and pollinators. It thrives in volcanic landscapes and can range from a sprawling shrub to a tall forest canopy tree depending on environmental conditions.

When should you plant Lehua ʻAlani 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.

Get my Lehua ʻAlani timeline →

Example Lehua ʻAlani timeline · Pittsburgh, PA (Zone 6b)

Plant Lehua ʻAlani
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Lehua ʻAlani
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Lehua ʻAlani dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun to partial shade; prefers 6+ hours of direct sunlight daily

💧

Water: Moderate water needs once established; drought-tolerant after maturity. Water regularly during establishment and dry seasons. Sensitive to waterlogged conditions; ensure excellent drainage.

📏

Spacing: 120 inches

📅

Days to maturity: 1095-1825 (3-5 years to flowering from seed; mature tree at 5-7 years)

🌱

Planting depth: Surface sow or barely cover seeds; do not bury deeper than 0.25 inches. For transplants, plant at same depth as container.

Soil

Type: Well-draining volcanic or sandy loam soil; tolerant of poor, infertile soils

pH: 5.5-7.0

Amendments:

Volcanic rock or perlite for drainage Compost for organic matter (minimal amendment needed) Sulfur if pH is too high

Growing Zones

Find your zone →

Thrives in USDA zones 10-12; grows best in Hawaii and warm tropical/subtropical climates

10a 10b 11a 11b 12a 12b

Get my Lehua ʻAlani timeline →

Growth Stages

Seed/Germination

2-4 weeks

Tiny seeds germinate slowly, developing initial root and cotyledons within 2-4 weeks. Seeds are dust-like and require light for germination.

Keep soil consistently moist but not waterlogged. Provide bright, indirect light. Use well-draining seed-starting mix. Bottom heat (70-75°F) aids germination.

Seedling

4-8 weeks

Small seedlings with initial true leaves emerge; growth is slow. First leaves are simple and opposite. Plant remains delicate and compact.

Maintain high humidity and bright light without direct hot sun. Keep soil moist. Avoid transplanting until 2-3 true leaves appear. Provide gentle air circulation.

Vegetative Growth

2-4 years

Plant develops woody stem, increasing foliage and branching. Leaves become more numerous and crowded. Growth accelerates after first year, especially if well-watered.

Gradually acclimate to outdoor conditions and full sun. Water regularly during dry periods. Prune lightly to encourage branching. Fertilize sparingly (low nitrogen). Mulch around base.

Pre-Flowering

6-12 months

Plant reaches reproductive maturity. Branch structure becomes denser. Flower buds begin forming at branch tips in late spring to early summer.

Maintain consistent moisture and full sun exposure. Avoid excessive nitrogen fertilizer, which promotes leafy growth over flowering. Minimal pruning preserves flowers.

Flowering & Fruiting

3-6 months flowering; fruits mature over several months

Vibrant crimson (occasionally orange or yellow) pom-pom flowers bloom, primarily June-September. Small leathery capsular fruits develop and persist after flowers fade.

Do not deadhead if fruit/seed development is desired for propagation. Maintain regular watering to support flowering. Enjoy nectar-feeding native birds (ʻApapane, ʻAmakihi).

Companion Planting

Plan your garden →

Plant with:

ʻŌhiʻa lehua (white-flowered variant) Santalum paniculatum (Hawaiian sandalwood) Sadleria cyatheoides (Hawaiian tree fern) Coprosma ernodeoides (Hawaiian coprosma) Dodonaea viscosa (ʻA) Native Hawaiian grasses

Avoid planting near:

Aggressive invasive species (Psidium guajava - guava, Morella faya - firetree) Plants requiring consistently wet soil Allelopathic plants that inhibit native growth

Common Pests

Spray with horticultural oil or neem oil; prune heavily infested branches; encourage natural predators.
Monitor for damage; spray with insecticidal soap if severe; usually not fatal to established trees.
Remove and destroy infected branches; improve air circulation; avoid overhead watering; isolate infected plants.

Uses

🦋

Native Bird & Pollinator Support

Wildlife

Lehua ʻAlani is a keystone species in Hawaiian ecosystems, providing nectar for endangered native Hawaiian honeycreepers such as the ʻApapane and ʻAmakihi. The tree's flowers are among the most important food sources for these endemic birds. [source]

🌿

Cultural & Spiritual Significance

Cultural

Deeply sacred in Hawaiian culture, Lehua ʻAlani is associated with the volcano goddess Pele and features prominently in Hawaiian mythology, traditional practices, and landscape restoration efforts. [source]

🏠

Ornamental & Landscape Use

Household

Prized as a decorative tree in Hawaiian gardens and tropical landscapes, valued for its striking pom-pom flowers in shades of crimson, orange, and rare yellow. Excellent focal point or canopy tree in drought-tolerant gardens. [source]

💊

Traditional Hawaiian Medicine

Medicinal

Traditionally used in Hawaiian healing practices; various plant parts have been employed in folk remedies. Modern research is exploring phytochemical compounds for potential health applications. [source]

🍳

Honey Production

Culinary

Lehua honey, produced when bees forage on Lehua ʻAlani flowers, is a prized Hawaiian specialty known for its light color and delicate floral flavor, representing an important cultural and economic product. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest mature seed capsules (brown and dried) in late fall to winter; collect seeds by opening dry capsules. Seeds can be air-dried and stored in cool, dry conditions. Flowers are ornamental; do not harvest for commercial purposes if supporting native ecosystems. Enjoy blooms in situ to support native Hawaiian bird populations.

Fun Facts

🌱 Lehua ʻAlani is the official flower of the Hawaiian island of Hawaiʻi (Big Island) and holds sacred status in Hawaiian traditions associated with Pele, the volcano goddess.
🌱 The tree exhibits remarkable ecological adaptability, growing as a low shrub in harsh, windswept lava fields at 10,000+ feet elevation, and as a tall canopy tree in mesic forests—an extreme example of phenotypic plasticity.
🌱 Traditional Hawaiian legend warns against picking Lehua flowers without permission from Pele, claiming that doing so would cause rain; this cultural taboo has helped protect the species in sacred areas.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Deadhead Full Sun Germination Mulch Partial Shade Transplant True Leaves

Shop Lehua ʻAlani plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Lehua ʻAlani planting timeline

Tell us your zip code and we'll calculate exactly when to start Lehua ʻAlani 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 Lehua ʻAlani timeline →