Easy in damp soil or shallow water this is a rhizomatous iris with erect sword-shaped leaves. Blue-purple flowers that have attractive, white veining blending to yellow, emerge in early summer. A less vigorous alternative to the yellow flag. Harmful if eaten.
Iris versicolor
Blue flag, Boston iris
Details
| Aspect | Full sun |
| Flower Colour | White | Yellow | Purple |
| Flowering Period | May | Jun |
| Foliage | Not evergreen |
| Goes Well With | Astilbe , Gunnera , Houttuynia |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 75cm |
| Soil | Wet, boggy |
| Spread | 40cm |
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