Also called Centaurea maculosa.

Native to northern 🇮🇹 Italy (Centaurea stoebe) and eastern 🇪🇺 Europe (Centaurea maculosa).  Invasive > learn+quiz Invasive > in USA+Canada Invasive > report it! Invasive > in Michigan inv. trading card

Spotted knapweed produces large amounts of nectar during a short season.  Thus, this plant is sometimes promoted by migratory beekeepers (the keepers migrate seasonally, with the bees being along for the ride) who are off-contract during that short spotted knapweed season.  Some then market their honey as being from "star thistle".  If you wish to discourage this process, please don't buy honey from "star thistle" in areas where it may be sourced from invasive spotted knapweed. [1]

Learn more about spotted knapweed Centaurea stoebe

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