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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
Clay
Loam
Sand
Soil Moisture
Wet
Sun Exposure
Part Sun
Full Sun
Range Map
Available
Not available
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.



