PlantsFlowers
Blue Flag Iris
Iris virginica var. shrevei
Chicago-region native. Suited to zone 6a.
Blue flag for rain garden or pond edge
EasyFlowersAlso Rain GardenRain garden
- Light
- Full sun–part shade
- Moisture
- Moist–wet
- Mature size
- 2–4 ft
- Spacing
- 18–30 in
- Bloom or harvest
- Flowers May–Jun
- How it spreads
- Moderate rhizomes
- What to buy
- Plug or division for reliable residential establishment; seed for larger restoration areas.
- When to plant
- Apr–May; late Aug–Sep, finishing about six weeks before the first frost.
In the design
Leave some stems and seedheads through winter; divide or thin only when needed.
