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Acacia mangium
Big-leaved Acacia
Acacia mangium
Acacia mangium, also known as black wattle, is a fast-growing, medium-sized tree native to Australia, Papua New Guinea, and Indonesia. It is known for its nitrogen-fixing ability, contributing to soil improvement. It features bipinnate leaves and small, fluffy yellow flowers. The tree is often used in reforestation projects due to its rapid growth and tolerance of various soil types. However, it can become invasive in some regions, so careful consideration of its planting location is important.
CategoryDetails
Invasive StatusInvasive Status
Plant TypePerennial plant
Duration to maturity12 months to harvest
Estimated Plant Lifespan20 years lifespan
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Insect pollination

Watering Requirements

Method: Top watering

Frequency: Water regularly, especially during dry periods, allowing soil to dry slightly between waterings.

Notes: Avoid overwatering, as this can lead to root rot.

Humidity Requirements

Level: Moderate

Cleaning RequirementsRegular pruning to maintain shape and remove dead or diseased branches. Monitor for pests and diseases and take appropriate action if necessary.
Temperature Range

Min: 10°C

Max: 35°C

Desmodium intortum
Greenleaf Ticktrefoil
Desmodium intortum
Both are nitrogen-fixing plants that can improve soil fertility, creating a mutually beneficial environment. Silverleaf desmodium can help control erosion, benefiting the Acacia mangium which may prefer well-drained soil.
Eucalyptus camaldulensis
river redgum
Eucalyptus camaldulensis

Both are fast-growing trees that compete for resources like sunlight, water, and nutrients. Eucalyptus camaldulensis, being a deep-rooted tree, is particularly effective in outcompeting shallower-rooted plants like Acacia mangium for water.

Psyllids

Psyllids are sap-sucking insects that can cause leaf distortion, yellowing, and reduced growth. Heavy infestations can weaken the tree, making it more susceptible to other problems.

Caterpillars

Various caterpillar species can feed on the leaves of Acacia mangium, causing defoliation. Severe defoliation can stunt growth and stress the tree.

Steps:

    • Collect mature seed pods from healthy trees.
    • Extract seeds from the pods and clean them.
    • Pre-treat seeds by soaking in water for 24 hours.
    • Sow seeds in a seedbed or containers with well-drained soil.
    • Maintain adequate moisture and warmth until germination.

Neem oil

Natural insecticide effective against psyllids and other sap-sucking insects.

Mycorrhizal fungi

Enhances nutrient uptake and improves drought tolerance.