description Tall Thistle Overview
Tall thistle (Cirsium altissimum) is a biennial or short-lived perennial in the aster family native to eastern and central North America. It develops a basal rosette before producing a tall, branching flowering stem with pink to purple flower heads, often reaching well above surrounding vegetation. The species grows in prairies, savannas, open woods, roadsides, and disturbed ground, and its flowers provide nectar and pollen for insects.
help Tall Thistle FAQ
What is the scientific name of tall thistle?
Tall thistle is Cirsium altissimum in the aster family, Asteraceae. It is usually biennial and begins with a basal rosette before producing its flowering stem.
How tall does Cirsium altissimum grow, and when does it bloom?
Tall thistle can reach about 3 to 10 feet in height. Its pink, purple, or reddish-purple flower heads generally bloom from July through September. [USDA plant guide](https://www.nrcs.usda.gov/sites/default/files/2022-10/_FINAL_AppalachianPlantGuide_Web.pdf)
Where does tall thistle grow naturally?
It is native across much of eastern and central North America, especially in the eastern United States. Typical habitats include bottomland forests, stream thickets, pastures, savannahs, old fields, and roadsides.
Is tall thistle useful for pollinators?
Yes. The USDA describes Cirsium altissimum as attractive to pollinators including bumblebees and monarch butterflies, and North Carolina Extension describes it as a native thistle that does not generally become weedy. [USDA plant guide](https://www.nrcs.usda.gov/sites/default/files/2022-10/_FINAL_AppalachianPlantGuide_Web.pdf)
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