Invasive Plant

Mountain Bluet

Centaurea montana

About This Species

Mountain bluet is a popular garden perennial, however, it easily escapes gardens and invades natural areas. This plant can self-seed, which makes it difficult to control. It also spreads through roots. Mountain bluet is found in meadows, pastures, roadsides and disturbed open areas.

How to Identify

Mountain bluet ranges from 30-80 cm in height. Flowers are large, bright blue with a ray-like appearance and black fringe at the base and look a lot like knapweed flowers. Fine hairs cover the stem. Leaves are 10-30 cm long, lance shaped, with a wooly underside.

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Take Action

Prior to seed production, pulling, cutting, or mowing can be effective. If flowers are present, be sure to properly dispose of plants to ensure no more seeds are dispersed. Try to remove as much of the root as possible to discourage regrowth.

Plantwise

Plantwise

Learn about best practices

A few non-invasive alternatives to plant instead of Mountain Bluet include:

  • Common camas (Camassia quamash)
  • Summer gentian (Gentiana septemfida)
  • Bluehead gilia (Gilia capitata)
  • Clustered bellflower (Campanula glomerata)
  • Wild bergamot (Monarda fistulosa)

Go Further

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