Smooth-barked kauri - Agathis robusta (Taxonomy, Characteristics, Distribution, Images)

Smooth-barked kauri

Also known as: Queensland kauri

Smooth-barked kauri (Agathis robusta) is a native tree of Australasia. It sheds its lower branches as it grows, leaving a smooth, straight trunk ideal for commercial timber. A hard resin known as dammar is obtained from the bark. This can be used for caulking boats, as an adhesive, and as an ingredient of ink.

Scientific classification

Species

Smooth-barked kauri (Agathis robusta)

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30 m to 50 m

Plant Height

4.5 m to 9 m

Spread

Green

Leaf Color

7 mm to 9 mm

Flower Size

White, Pink, Cream, Purple

Flower Color

Green, White, Purple, Pink, Cream

Stem Color

Evergreen

Leaf type

20 - 38 ℃

Ideal Temperature

Images of Smooth-barked kauri

Distribution of Smooth-barked kauri

Distribution Map

Smooth-barked kauri is a coniferous tree native to subtropical rainforests in the Australasian region. It has been introduced to several areas within the Pacific Islands, where it has adapted to local conditions and is cultivated.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Rainforests

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Smooth-barked kauri

Straight trunk with light grey-brown, flaking bark

Leathery elliptic leaves, 3-4 inches (7.5-10 cm) long

Oppositely or spirally arranged leaves

Separate male and female cones on same plant

Female cones transition from green to brown, 4-6 inches (10-15 cm) tall

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Care Guide for Smooth-barked kauri

Every 1-2 weeks

Water

Full sun

Sunlight

20 - 38 ℃

Ideal Temperature

Water: Originating from humid environments in Australia and New Guinea, smooth-barked kauri thrives with moderate hydration, favoring watering every 1-2 weeks. Preferring outdoor conditions, this evergreen plant requires adequate soil moisture to maintain healthy foliage throughout the year.

Fertilize: Fertilizing smooth-barked kauri with a balanced, slow-release formula biannually during spring and summer promotes robust growth. Use about a handful per meter of growth, avoiding overfertilization. Reduce feeding in fall and withhold in winter. Lightly incorporate fertilizer into the soil to optimize nutrient absorption.

Pruning: Smooth-barked kauri features a tall stature and smooth, grey bark. Prune between early and late winter to improve shape, remove weak branches, and enhance growth. Thinning dense areas boosts air circulation. Use clean cuts and the appropriate tools: pruning shears for small branches and a saw for larger ones.

Propagation: Originating from Australasia, smooth-barked kauri is an evergreen conifer valued for its timber. Successful propagation requires seeds from healthy trees, sown in well-draining sandy soil. Consistent moisture is essential for germination, along with a sheltered environment to protect seedlings during establishment.

Repotting: Repot smooth-barked kauri every 2-3 years in spring for optimal root establishment. Select a deep, sturdy container for support. After repotting, ensure ample watering and place in bright, indirect light to aid recovery and maintain health.

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Images of Smooth-barked kauri

Distribution of Smooth-barked kauri

Quickly Identify Smooth-barked kauri

Care Guide for Smooth-barked kauri

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