Carduus nutans (Musk Thistle) - Biennial

Size:

  • Grows to 6+ feet tall

Leaves:

  • Dark green with light green midrib; deeply lobed, spiny margins; edges  often “frosted”

Stem:

  • Hairless, spiny winged, green, sometimes wooly and branched

Flowers:

  • Single large pink to purple bloom at the end of each stem, up to 3 inches  wide, usually bent over (“nodding thistle”); surrounded by purplish bracts

Roots:

  • Deep, fleshy taproot

Seeds:

  • Downy; prolific; float on the wind

Habitat:

  • Roadsides, disturbed areas

Control:

  • Dig rosettes when soil is moist, removing at least 4” of root. Cutting the  top growth prompts the plant to send up additional flowers; if cutting,  sever at base of plant. Bag ALL seed heads. Don’t let it set seeds!

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Cirsium arvense (Canada Thistle)

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Onopordum acanthium (Scotch Thistle)