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General Information About the Albizia Lebbeck Tree
The Albizia lebbeck tree—commonly known as the Siris tree, Woman’s Tongue tree, or Lebbek—is a fast-growing deciduous species belonging to the Fabaceae family. It originates from India, tropical regions, subtropical areas, and savannas. This tree is known for its large size and wide canopy, typically reaching 15–20 meters in height, and in some cases up to 30 meters.
Albizia lebbeck is widely planted in dry tropical regions as a forest tree, and it is also valued for producing high-quality hardwood used for fuel and exported to Europe. Despite its benefits, caution is required when working with it: the wood dust is aromatic and peppery, and may irritate the nose and throat. The bark also exudes a reddish substance that can irritate the skin.
Characteristics of the Albizia Lebbeck Tree
The Albizia lebbeck tree has gray-brown bark and features clusters of lush, fern-like green leaves. The tree blooms once or twice a year—between September and October—producing flowers with long creamy-yellow stamens and a pleasant, sweet fragrance. This scent becomes stronger in the evening when the leaves slightly fold.
Fruit pods appear from May to September. The seeds are narrow and elongated, resembling brownish-yellow flat beans, enclosed in flattened pods.
Ideal Growing Conditions for Albizia Lebbeck
Light
The tree requires full sun exposure and does not tolerate shaded areas.
Soil
Albizia lebbeck grows well in light sandy soil, medium loamy soil, or heavy clay soil. The soil should remain moist yet well-drained. The tree can also tolerate nutrient-poor soils.
Soil pH
It grows well in neutral, slightly acidic, or moderately alkaline soil—and can even tolerate saline soil.
Agricultural Uses of Albizia Lebbeck
- Attracting bees: The tree produces large amounts of nectar and pollen, making it an excellent choice to boost honey production.
- Providing shade: Often planted in gardens and parks for its wide canopy.
- Preventing soil erosion: Its strong roots help stabilize the soil.
- Green manure: The leaves are rich in nitrogen, making them useful as mulch or green fertilizer.
- Soil improvement: The tree helps restore old or degraded land by fixing atmospheric nitrogen into the soil.
