Crocosmia x crocosmiiflora
Photo by Forest and Kim Starr



  • This plant has a Plant Risk Evaluator rating of No PRE Rating
  • This plant has been rated Limited by the California Invasive Plant Council


Crocosmia x crocosmiiflora (crocosmia or montbretia) is a perennial (family Iridaceae) found along the coast of California and in the San Francsico Bay region. It is native to southern Africa, and has established itself in wildlands throughout the Hawaiian Islands.

Crocosmia is a commonly cultivated ornamental plant, and is most commonly found near urban areas. It prefers disturbed areas, including roadsides, coastal scrub, prairie and forests. Crocosmia is a superior competitor for water, light and nutrients, and it excludes native plants by growing in dense patches. It reproduces using seeds and underground corms. Upon introduction to a new area, crocosmia spreads slowly at first, then more rapidly as the species becomes established. (From Cal-IPC)

Why is this plant not included on the invasive plant list?

It was considered in 2006 but the impact and risk was too low to add it to the plant list. It has never been included in the nursery survey.

More information

For more information about this plant, please see the following resources: