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Plant guide

Tamanu.

Calophyllum inophyllum

Pronounced ka-lo-FIL-um in-oh-FIL-um

Also known as Alexandrian Laurel, Alexandrian-laurel, Beach Calophyllum, Beautyleaf, Borneo Mahogany, Borneo-mahogany, Indian doomba oiltree, Indian-laurel

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Alexandrian Laurel
Photo by chen ying-hsiao (CC BY-SA) via iNaturalist

The tamanu tree is a beautiful, slow growing evergreen known for its glossy, dark green leaves and fragrant white flowers. It thrives in coastal areas and is highly valued for the rich oil extracted from its seeds. It makes a lovely ornamental tree if you have the space for its wide, spreading canopy.

Another photo of Tamanu
Photo by Mark McVeigh (CC0) via gbif

At a glance

Care level
Moderate
Plant type
Evergreen tree
Light
Full sun
Indoor light
Direct sun
Water
Every 7 to 14 days
Mature size
20 to 30 meters
Growth rate
Slow
Hardiness
USDA 10 to 12
Bloom time
Intermittent throughout the year

Care

This tree prefers well draining soil and plenty of sun to stay healthy. Watch for yellowing leaves which may indicate poor drainage or overwatering. Keep an eye out for common pests like scale or aphids during the warmer months.

Watering
Water deeply once the top few inches of soil feel dry to the touch.
Feeding
Apply a balanced fertilizer during the active growing season.
Pruning
Prune lightly once a year to maintain shape and remove dead branches.
Repotting
Repot only when the tree has clearly outgrown its current container.
Soil
Sandy, well draining soil
Soil pH
6.0 to 7.5
Temperature
10 to 35°C
Humidity
60 to 90%
Drought tolerance
Moderate
Lifespan
Long lived perennial tree.
Fragrance
Strong
Deer and rabbits
Moderate

Signs it needs repotting

  • Roots growing out of drainage holes.
  • Stunted growth despite proper care.

Safety

People
All parts of the plant are considered toxic if ingested, especially the seeds.
Pets
The seeds and oil are considered toxic if ingested by cats or dogs.
Children
Keep children away from the fruit and seeds as they are poisonous if swallowed.
Contact allergens
The sap can cause skin irritation in sensitive individuals.
Airborne allergens
There is no significant evidence of airborne allergens.
Edibility
The seeds contain toxic compounds and should never be consumed.

How to identify it

  • Glossy, leathery, dark green leaves
  • Fragrant white flowers with yellow centers
  • Large, round, green fruit
  • Spreading, irregular canopy shape
  • Deeply fissured, dark gray bark
Height
8 to 20m
Spread
6 to 15m
Leaves
dark green, glossy, evergreen
Flowers
white, 2 to 3cm
Fruit
green, brown, Year round

Problems to watch for

    Check your tamanu from a photo

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    Growing it

    Propagation
    seed, cuttings
    When to plant
    spring, summer
    Overwintering
    Protect from frost at all costs as it is strictly a tropical plant.
    In containers
    Not suitable for long term container growth due to its massive size.

    Seed

    1. 1. Collect mature brown fruit.
    2. 2. Remove the fleshy outer layer.
    3. 3. Plant in moist sandy soil.
    4. 4. Keep warm until germination.

    Plant in areas with well draining soil to prevent root rot.

    Grows well with

    • Coconut Palm · They share similar coastal environmental requirements.
    • Sea Grape · Both are excellent for stabilizing sandy coastal soils.

    Similar species

    • Calophyllum brasiliense · A related species with similar growth habits.

    Science

    Family
    Calophyllaceae
    Genus
    Calophyllum
    Order
    Malpighiales
    Class
    Magnoliopsida
    Native range
    Tropical regions of Asia, Africa, and the Pacific Islands.
    Conservation
    This species is not currently listed as endangered.

    It is a salt tolerant tree that naturally stabilizes sandy coastal dunes.

    Value to wildlife
    provides nesting habitat, nectar source
    Pollinators
    bees, butterflies
    Uses
    ornamental shade tree, coastal erosion control, oil production, timber

    Through the year

    JFMAMJJASOND
    Flowering
    Fruiting
    Foliage

    Ecological indicators

    Salinity
    8/9
    Soil reaction
    7/9
    Light
    8/9
    Temperature
    9/9
    Moisture
    6/9
    Nutrients
    5/9

    Taxonomy resolved against GBIF.

    Questions people ask

    Can I grow this in a pot?
    It is generally too large for long term container growth.
    Does it need full sun?
    Yes, it performs best in full sun exposure.

    Where the name comes from

    The name Calophyllum comes from Greek words meaning beautiful leaf, while inophyllum refers to its leaf veins.

    Good to know

    • It is often called the Alexandrian laurel.
    • The wood is highly valued for boat building due to its resistance to rot.
    • It thrives in salty coastal environments.
    • The flowers are quite fragrant.

    Also in

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    This guide was generated with AI on and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.