Plenty of large pale blue flowers from August through October, smooth leaves clasp the branching & subtly zig-zag stem, attracts butterflies and bees, beautiful forest edge plant, tolerates sand and clay, spreads by seed and short rhizomes.
1-3 foot tall
Plant Hardiness Zones: 4a-7a
Native Range: upstate NY west to WI and IA, south to the NC & TN mountains
Germination - Easy: Cold Stratify 8 weeks. Surface sow.
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