Woolly senna - Senna hirsuta (Taxonomy, Characteristics, Flower, Images)

Woolly senna

Also known as: Stinking cassia

Woolly senna is a leguminous shrub recognized for its woolly textured leaves and bright yellow, butterfly-shaped flowers. It thrives in open, sunny habitats and has an adaptive growth pattern that allows it to prosper in a variety of soil types. The plant's seedpods are conspicuously elongated, which, when dried, twist open to disperse seeds, aiding in its propagation and resilience.

Scientific classification

Species

Woolly senna (Senna hirsuta)

Legumes, milkworts and allies

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60 cm to 2.5 m

Plant Height

2.5 cm to 4 cm

Flower Size

Yellow

Flower Color

Deciduous

Leaf type

15 - 38 ℃

Ideal Temperature

Images of Woolly senna

Distribution of Woolly senna

Distribution Map

Woolly senna is a plant with a widespread presence, native to Central and South America. Its introduced range extends across major regions including parts of Africa, Asia, and the Pacific islands. In certain areas where woolly senna is introduced, it is sometimes thought to be competitively robust, potentially having an impact on ecosystems. However, its status as an invasive species is of particular concern in regions of Eastern Africa.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Woolly senna

Every 2-3 weeks

Water

Full sun

Sunlight

15 - 38 ℃

Ideal Temperature

Water: Woolly senna is an evergreen plant suited for arid conditions, showcasing excellent drought tolerance. It thrives with minimal watering, requiring water every 2-3 weeks. Its hardy nature allows it to endure low rainfall while maintaining health when grown outdoors.

Fertilize: Fertilization promotes growth and flowering in woolly senna. Apply a balanced, slow-release fertilizer biannually in spring and fall, adhering to label rates to prevent damage. Reduce fertilizer in winter; always water woolly senna post-fertilization to enhance nutrient absorption and avoid root burn.

Pruning: Woolly senna features yellow flowers and hairy pods. Prune early spring, removing weak branches and one-third of older stems to promote growth. Regular pruning improves airflow and reduces disease risk. Avoid heavy pruning during blooming to maintain flower displays for a healthier, more vibrant plant.

Propagation: Woolly senna propagates best via stem cuttings. Use healthy, semi-woody stems with rooting hormone in a well-draining, moist medium. Reduce leaves to minimize water stress, but retain enough for photosynthesis. Humidity domes or greenhouses can improve moisture retention and successful propagation.

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