Hoary alyssum (Berteroa incana)

Hoary alyssum

Berteroa incana


Hoary alyssum (Berteroa incana) Photo: Kallerna (CC BY-SA)
  • Native to east-central Europe and western Asia.
  • Annual or short-lived perennial.
  • In the Mustard family.
  • Has white flowers with notched petals.
  • Multiple stalks arise from the base of the plant.
  • Stems and leaves feel rough, similar to a sandpaper texture
  • Grows well on sandy and/or gravelly soils and dry disturbed open sites.
  • Found throughout the CKISS region.

Introduction and spread

  • Reproduces by seed.
  • Each plant produces many seeds!
  • Seeds can spread on vehicles, boots, clothing, equipment, or by animals, wind and water.

Status in the CKISS region

  • It is considered to be widespread in the Creston Invasive Plant Management Area (IPMA).
  • It is less prevalent in the Slocan IPMA, where it is classified as Eradicate and eradication is feasible.
  • In the rest of the CKISS region, efforts are made to Contain hoary alyssum and limit further spread.
  • If you notice this plant growing outside of its containment area, please report it!
  • To learn more about how CKISS classifies and manages invasive species, see our Invasive Species Priority Lists page.

Consequences of invasion

  • Invades rangelands and pastures, impacting livestock.
  • Infestations can reduce hay quality and value.

Integrated pest management options

  • Prevent establishment through appropriate range management practices, limiting soil disturbance, and encouraging healthy native plant populations.
  • Small populations can be addressed by pulling the plants before seeds have set.
  • Mowing can help to reduce seed production, but will not eliminate the population.
  • Become PlantWise and avoid growing hoary alyssum in your garden.

Additional resources