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.
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.
Spread: 2-2.5 feet
Water: medium to wet
Best Soil: Sand to Clay
Growth Habit: Grows well in wet areas.
Their roots are dangerously poisonous to both humans and livestock.