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| Hardiness zone | 3 | | Maximum height | 50 cm / 20" | | Maximum width | 40 cm / 16" | | Exposure | Sun / Half-shade | | Plants attracting birds | No | | Fragrant plants | No | | Notes : Growing in swamps, wet meadows, scrub and by lakes and river, flowering in June-July. Flowers usually bluish purple. |
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