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.
  • 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 be spread on vehicles, boots, clothing, equipment or by animals, wind and water.

Status in the CKISS region

  • Hoary alyssum is classified as Contain on the CKISS Annual Priority List.
  • It is considered Established in the Creston Invasive Plant Management Area (IPMA).
  • Hoary alyssum is less prevalent in the Kaslo IPMA, so it is classified as Eradicate/Annual Control in that area.
  • In the rest of the CKISS region, efforts are made to Contain hoary alyssum and limit it’s distribution.
  • 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 the plants to can help to reduce seed production but will not eliminate the population.
  • Become PlantWise and avoid growing hoary alyssum in your garden.

Additional resources