Sonchus asper, commonly known as prickly sow-thistle or spiny-leaved sow thistle, is an annual or biennial herb that originates from Europe, North Africa, and western Asia. It is typically found in disturbed sites, roadsides, and fields within its native range. The plant can grow up to 79 inches tall and is characterized by its spiny leaves and bright yellow, dandelion-like flowers that bloom from early summer to fall. The leaves are bluish-green with wavy, lobed margins, and the stems emit a milky sap when cut. The flowers are showy and attract various pollinators.

Prickly sow-thistle is known for its rapid growth and ability to colonize disturbed areas quickly, making it a concern as an invasive species outside of its native habitat. It is often found in urban environments, agricultural fields, and gardens, where it can become a troublesome weed. This plant prefers full sun to partial shade and can tolerate a wide range of soil types, provided they are well-drained. It is drought-tolerant once established and requires minimal maintenance, which contributes to its invasive potential. Gardeners should be cautious about cultivating Sonchus asper due to its invasive nature and potential to outcompete native vegetation.CC BY-SA 4.0