How to Grow Hairy Naupaka

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Hairy Naupaka

Scaevola mollis

shrub

Hairy naupaka is a native Hawaiian shrub known for its distinctive one-sided white or pale pink flowers and soft, hairy foliage. It typically grows 3-6 feet tall and is well-adapted to coastal and dry conditions. This plant plays an important ecological role in Hawaiian native plant communities.

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Example Hairy Naupaka timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Hairy Naupaka

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Hairy Naupaka

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; tolerates partial shade
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Water: Drought-tolerant once established; water moderately during establishment (first 6-12 months), then reduce frequency. Requires well-draining conditions to prevent root rot.
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Spacing: 36-60 inches
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Days to maturity: 18-24 months to flowering maturity
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Planting depth: Same depth as root ball for transplants; seeds require light exposure for germination

Soil

Type: Well-draining sandy or rocky soil; tolerates poor, infertile soils
pH: 6.0-7.5
Amendments:
Perlite or coarse sand for improved drainage Minimal fertilizer needed; avoid nitrogen-rich amendments

Growing Zones

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Thrives in USDA zones 10b-11, with protection in zone 10a; best in Hawaii and coastal southern Florida

10b 11a 11b

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Growth Stages

1

Seedling

4-8 weeks

Tiny seedlings emerge with soft, hairy cotyledons and developing true leaves

Keep soil consistently moist but not waterlogged; provide bright indirect light; protect from intense direct sun initially

2

Vegetative Growth

6-12 months

Young plant develops multiple stems, hairy foliage becomes more prominent, and plant establishes root system

Gradually acclimate to full sun exposure; reduce watering frequency; avoid fertilizer or use dilute, balanced formula sparingly

3

Flowering

Spring through fall, intermittent blooming

Plant produces distinctive one-sided white to pale pink flowers clustered at branch tips; flowers open progressively

Maintain drought conditions once established; light pruning after flowering encourages bushier growth; no deadheading needed

4

Fruiting

4-6 weeks after flowering

Small white or pale drupes (stone fruits) develop where flowers were; seeds contained within

Allow fruits to mature naturally; minimal intervention needed; birds may disperse seeds naturally

5

Dormancy/Mature Plant

Ongoing through plant maturity

Established mature shrub becomes fully drought-tolerant; minimal growth in dry season

Minimal watering except during severe drought; prune only to shape or remove dead wood; avoid over-fertilizing

Companion Planting

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Plant with:

Avoid planting near:

Aggressive non-native invasive species Plants requiring frequent irrigation Nitrogen-fixing plants that may compete

Common Pests

  • Inspect regularly; prune heavily infested branches; use horticultural oil sprays in early morning or late afternoon

  • Remove with soft brush and neem oil; improve air circulation; avoid over-watering

  • Spray foliage with water to increase humidity; use miticide if severe; avoid excess nitrogen fertilizer

  • Yellow sticky traps; insecticidal soap spray; encourage natural predators like ladybugs

Uses

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Native Pollinator Support

Wildlife

Hairy naupaka attracts native Hawaiian insects and pollinators with its distinctive one-sided flowers. The plant provides important nectar for native bees and other beneficial insects that are crucial to Hawaiian ecosystems. [source]

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Ecological Restoration

Craft

Widely used in habitat restoration projects and native plant gardens throughout Hawaii to restore coastal and leeward dryland ecosystems. Its drought tolerance and coastal habitat preference make it ideal for climate-resilient landscaping. [source]

🏠

Ornamental Landscaping

Household

Popular choice for xeriscaping, coastal gardens, and low-maintenance native plant landscapes in tropical and subtropical regions. Its attractive hairy foliage and unique flowers provide year-round visual interest with minimal care. [source]

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Traditional Hawaiian Uses

Medicinal

Historically used in traditional Hawaiian medicine and cultural practices. The plant has ethnobotanical significance in Hawaiian plant knowledge systems. [source]

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Native Bird Habitat

Wildlife

Provides food and shelter for native Hawaiian birds; the fruits are eaten by native avian species that aid in seed dispersal throughout natural habitats. [source]

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

Harvest Tips

Not typically harvested for consumption. For propagation, collect ripe fruits in late summer to fall; remove pulp and extract seeds. Seeds can be cleaned and dried for storage or immediate sowing.

Fun Facts

  • 🌱 The name 'naupaka' comes from Hawaiian mythology; legend says naupaka was a girl transformed into a plant, which explains why the flower appears incomplete (one-sided) — her other half is the naupaka kahakai (beach naupaka) with the opposite flower form.
  • 🌱 Hairy naupaka is endemic to Hawaii and found naturally only on the Hawaiian Islands, thriving in harsh coastal and leeward dryland environments where few other plants can survive.
  • 🌱 The distinctive one-sided (half) flowers are an adaptation that makes them easily recognizable; despite their unusual appearance, they are highly attractive to native Hawaiian insects and pollinators.

Gardening Terms

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