🌊Hawaiian & Polynesian Medicine

Ohi'a Lehua (Metrosideros)

Metrosideros polymorpha

About Ohi'a Lehua (Metrosideros)

Ohi'a Lehua (Metrosideros) (Metrosideros polymorpha) is a herb used in the Hawaiian & Polynesian Medicine tradition to help with Cough, Sore Throat, Wound Healing, and Fever. The aerial parts and leaves are the parts traditionally used, used both internally and topically.

Botanical background

Metrosideros polymorpha, the ʻōhiʻa lehua, is a species of flowering evergreen tree in the myrtle family, Myrtaceae, that is endemic to the six largest islands of Hawaiʻi. It is a highly variable tree, being 20–25 m (66–82 ft) tall in favorable situations, and a much smaller prostrate shrub when growing in boggy soils or directly on basalt. It produces a brilliant display of flowers, made up of a mass of stamens, which can range from fiery red to...

Source: Wikipedia, via iNaturalist

Parts used

Aerial Parts · bothLeaves · both
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Ohi'a Lehua (Metrosideros) in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Ohi'a Lehua (Metrosideros) into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Ohi'a Lehua (Metrosideros) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
🖐️

Topical / Poultice

1–2× daily as needed
  • Mash fresh Ohi'a Lehua (Metrosideros) or mix the powder with a little water to form a paste.
  • Apply to the affected area for 20–30 minutes.
🫙

Infused Oil

Massage into affected area 1–2× daily
  • Fill a jar with dried Ohi'a Lehua (Metrosideros).
  • Pour over a carrier oil until submerged.
  • Leave for 4–6 weeks, then strain.
  • Use topically or as a salve base.
♨️

Steam Inhalation

1–2× daily during acute symptoms
  • Add 2–3 tbsp of Ohi'a Lehua (Metrosideros) to a bowl of just-boiled water.
  • Drape a towel over your head and inhale steam for 5–10 minutes.
🛁

Herbal Bath

2–3× per week as needed
  • Brew 4–6 tbsp of Ohi'a Lehua (Metrosideros) in 1 litre of hot water for 15 minutes, strain, and add to a warm bath.
  • Soak for 20–30 minutes.

Pregnancy, Breastfeeding & Children

No herb-specific pregnancy/child safety research is documented for Ohi'a Lehua (Metrosideros) in our references — the guidance below is based on its general effect category, not research on Ohi'a Lehua (Metrosideros) itself. Always confirm with a midwife, doctor, or pediatrician.

Pregnancy

Insufficient Data

No specific pregnancy safety research is documented for this herb in our references. This doesn't mean it's unsafe — it means it hasn't been well studied. Treat as unstudied and avoid unless a midwife or doctor familiar with your pregnancy advises otherwise.

Breastfeeding

Insufficient Data

No specific breastfeeding safety research is documented for this herb in our references. Treat as unstudied and consult a lactation consultant, midwife, or doctor before use.

Children

Insufficient Data

No specific pediatric safety/dosage research is documented for this herb in our references. Treat as unstudied and consult a pediatrician or pediatric herbalist before giving to a child.

Contraindications

    Warnings

    ⚠️ Allergic Reactions

    Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

    ⚠️ Not Medical Advice

    This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

    Drug & herb interactions

    No specific drug or herb interactions are documented for Ohi'a Lehua (Metrosideros) in our references. This doesn’t mean none exist — always check with a pharmacist or doctor before combining any new herb with prescription medication.

    Where to find in nature

    Native region

    Pacific Islands — Hawaii, Samoa, Tonga, Tahiti

    Climate

    Tropical maritime

    Habitat

    Pacific Island forests, coastal vegetation, and traditional garden plots

    🌿 To see Ohi'a Lehua (Metrosideros) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

    Where to buy

    In store

    • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
    • Naturopathic clinics and integrative medicine practices
    • Specialist herbal apothecaries and herbalist practices
    • Farmers markets with herb vendors

    Online

    iHerb

    Wide selection of standardised extracts, capsules, and powders with lab testing

    Mountain Rose Herbs

    Premium bulk dried herbs — certified organic, ethically sourced

    Starwest Botanicals

    Large selection of certified organic bulk herbs and powders

    Herb Pharm

    High-quality liquid extracts and tinctures, rigorous quality standards

    Amazon

    Convenient — verify brand certifications and check third-party testing

    Etsy

    Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

    Quality tips

    When buying Ohi'a Lehua (Metrosideros), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.