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| Hardiness zone | 4 | | Maximum height | 2m / 7' | | Maximum width | - / - | | Exposure | Sun / Half-shade | | Plants attracting birds | No | | Fragrant plants | No | | Notes : Another favorite that has held its own for over one hundred years. 15-20cm (6-8") deep purple blue flowers with striking red tipped stamens bloom from June to September. Pruning group B. |
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