There are a number of invasive plant species in the Central Kootenay.
Download our most recent priority list here (PDF - 44KB)

For more detailed information on the biology, distribution, and management strategy for each species in our region, please see the Invasive Plant Profiles

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Yellow flag iris

Although yellow flag iris (Iris pseudacorus) is a beautiful garden ornamental, it is also an aggressive invader. When plants are introduced into natural habitats such as ponds, marshes and other wetlands, they can form dense thickets and displace native species. Infestations can impact amphibians, birds, and other wetland animals. In the West Kootenay, it is known in only a few locations, including Creston, Nancy Greene Lake, and the north shore of Nelson.

Yellow flag iris can be identified because it is the only "wet-footed" yellow iris. If there is a yellow iris growing in a pond, ditch, lake edge, or other wet area on your property, control it immediately! Small patches of plants can be dug up. For larger patches, clip seed heads off in July to prevent further spread of this species. Wear gloves since this plant can give off a toxic resin. Be sure to carefully remove garden waste by burning or removing in plastic bags.

For gardeners, yellow flag iris can be replaced with other attractive wetland plants that are not invasive, including a non-invasive iris species ( Iris ensata, laevigata, versicolor, robusta) or with native cattail (Typha latifolia).

Since only a few patches of yellow flag iris are known in the Central Kootenay, report any sightings of this species to the CKIPC.


Additional Information:
www.nwcb.wa.gov/weed_info/Written_f ...

Invasive Plant Profile:
Yellow flag iris - Iris pseudacorus - 448.7 KB

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