Blue Flag, Wild Iris

Blue Flag, Wild Iris

Botanical Name: Iris versicolor

En Français: Iris versicolore


Iris veriscolor, commonly called northern blue flag, is a clump-forming iris that is native to marshes, swamps, wet meadows, ditches and shorelines from Manitoba to Nova Scotia. It has deep blue to purple flowers, the foliage is sword-like, and the flowers are complex and very showy.

It flowers during late spring and early summer, producing several violet-blue flowers. The down-curved violet sepals are veined in yellow and white. The flowers are 2.5 to 4 inches wide.

Best grouped in sunny areas of ponds or water gardens. Also may be grown in moist border areas.

Other Characteristics

Pollinators: Bees

Sun/Shade: Full Sun

Planting and Care Considerations

Keep its roots moist by placing it in a damp area or a well-mulched garden or submerging it in the shallows of a pond.
Propagate by division after bloom.
After fall frost, plant leaves may be trimmed back to about 1” above the crown.

Asclepias incarnata, Carex muskingumensis

Spread: 2-2.5 feet

Water: medium to wet

Best Soil: Sand to Clay

Growth Habit: Grows well in wet areas.

More Information

Their roots are dangerously poisonous to both humans and livestock.