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Northern Blue Flag Iris

Iris versicolor

Northern Blue Flag Iris is a robust and widely adored perennial that is native to wetlands and aquatic environments across North America. It produces beautiful sword-like green leaves that form dense clumps, reaching up to 3 feet in height. In late spring to early summer, it blooms with exquisite blue-violet flowers, each marked with yellow and white accents. This iris is not only a visual treat but also serves an ecological role by stabilizing soil and providing habitat in water garden settings.

Details

Height24” - 36”
Spread12"
Bloom SeasonJune – July
Soil Types
clayClay
loamLoam
sandSand
Soil Moisture
wetWet
Sun Exposure
partSunPart Sun
fullSunFull Sun

Range Map

Native
No current
record

Ecological Benefits

Maintenance Tips

  • Thrives in wet conditions; ideal for planting in areas that are consistently moist or shallowly flooded.
  • Best divided in late summer or early fall every few years to rejuvenate clumps and spread the beauty of the flowers.
  • Check regularly for pests like iris borers and treat fungal issues promptly to maintain healthy plants.

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