Chromolaena odorata, commonly known as Jack in the Bush, is a rapidly growing perennial herb that is considered a shrub in its native habitat of tropical and subtropical America, including the Caribbean, Mexico, and Florida. It thrives in disturbed areas, forest edges, and secondary forests, often colonizing areas after fires or deforestation. This species typically grows up to 2.5 m (100 inches) tall in open areas, with a woody base and soft stems. In shady conditions, it exhibits etiolation and can climb up to 10 m (33 feet) on other vegetation. The plant is covered in fine hairs and glands, emitting a strong, aromatic odor when the leaves are crushed. The leaves are opposite, triangular to elliptical with serrated margins, measuring 4–10 cm long by 1–5 cm wide. From summer to fall, it produces showy panicles of 10 to 35 small, white to pale pink tubular flowers at the branch tips.

Jack in the Bush is valued for its rapid growth and aromatic foliage, which can be used for herbal remedies and as a natural insect repellent. However, due to its invasive nature, it is not recommended for cultivation outside its native range. It prefers full sun to partial shade, tolerates a wide range of soil types, and requires little maintenance once established. In its native range, it can be used for erosion control and as a pioneer species in reforestation projects. Gardeners should be aware of its potential to spread aggressively and its classification as an invasive weed in many regions.CC BY-SA 4.0