🌿 Morphology
🌞 Growing conditions
🌍 Origin and family
🌾 Uses
Warning: Despite the care taken in writing this sheet, it is essential to cross-reference sources before using or consuming any plant. When in doubt, consult a qualified professional
Permaculture uses
Star-thistle is primarily considered a weed and is not generally used in permaculture. It is a good source of nectar for pollinators, benefiting the overall ecosystem, but its aggressive growth habit often outweighs this benefit. Some cultivars may be explored for erosion control on disturbed sites with poor soil.
Permapeople description
The red star-thistle, is a species of plant in the family Asteraceae. It is native to Europe and is considered an invasive species in many parts of the world.
Botanical description
Centaurea calcitrapa, commonly known as red star-thistle or purple star-thistle, is an annual or biennial plant in the Asteraceae family. It features a spiny winged stem that can grow up to 3 feet tall. The leaves are deeply lobed and spiny. Flowers are thistle-like and typically purple, although pink or white variations can occur. A key identifying feature is the sharp, rigid spines surrounding the flower head.
Companion planting
Due to its aggressive nature, Centaurea calcitrapa is generally not considered a good companion plant. It competes with other plants for resources and can quickly dominate an area. No specific beneficial companions are known. Control efforts are best focused on preventing its spread near desirable plants.
Propagation methods
Propagation is primarily through seeds. The plant readily self-seeds, contributing to its invasive nature. Seeds can be collected and sown in the fall or spring.
History and traditions
Historically, star-thistle has been regarded as a medicinal plant in some cultures, with purported uses for wound healing and treating various ailments. However, modern herbalism rarely employs it due to its aggressive nature and the availability of safer alternatives. It's more commonly known as an invasive weed.
Usage calendar
Flowering typically occurs from summer to fall (June to October). Seed dispersal follows flowering. Control efforts are most effective before flowering and seed set. Planting for erosion control (if desired) is best done in the fall or early spring.