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Large leaves emerge in spring looking like a big bunch of green chard and remain a basal clump until late summer. Then 5 foot stems erupt with clusters of sky blue flowers. Clusters of light pink-purple flowers with yellow centers on tall branching stems. Sunny or lightly shaded site in well drained but evenly moist fertile soil that doesnโt remain too wet in winter. Zone 4-8. Note: Plants can spread aggressively by rhizomes in optimum growing conditions.
| Sun | |
| No | |
| 3-5 ft | |
| 1-2 ft | |
| Fall | |
| Yes | |
| No | |
| Average | |
| Yes | |
| Violet | |
| Mild | |
| Yes |