Home Prairie and Wetland Center
16245 S US Hwy 71
Belton, MO 64012
Tel: (816) 331-9738
Fax: (816) 331-9739

Iris pseudacorus

Yellow Flag Iris

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Iris pseudacorus (Yellow Flag Iris)

This highly invasive, non-native wetland plant is especially showy during its short blooming period. It has been transplanted into well-watered gardens all over the world and has widely escaped. It is also used in sewage treatment because of it capacity to remove metals from wastewaters. Like cat-tails, Yellow Flag Iris colonizes into large numbers, forming very dense monotypic stands, outcompeting other plants.

Additional Information:

36-50 Inches


18-36 Inches


Bloom/Seasonal Color
Medium Yellow

USDA Hardiness Zone 2 - 10

Home Owner Growing and Maintenance Tips:
Should be avoided.

Characteristics & Attributes

Hydrologic Designation




Season of Interest

Mid (May-June)

Sun Exposure

Full Sun

USFS MO Ecological Map