PlantsFlowers
Blue Flag Iris
Iris virginica var. shrevei
Chicago-region native. Suited to zone 6a.
Blue flag for rain garden or pond edge Fits Pollinator Gardens, Native Plant Gardens, Rain Gardens, Cottage Gardens and Container Gardens.
Pollinator GardensNative Plant GardensRain GardensCottage GardensContainer GardensEasyFlowersAlso 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.
