This cultivar this 2½–3½'bears long-lasting deep blue rounded star-shaped flowers from June to August. Called Balloon Flower because the buds look like inflated balloons ready to burst. Developed specifically for the cutflower trade, from a plant native to East Asia. One of the Seven Flowers of Autumn in Japanese gardening. Slow to emerge in spring; needs some support once it does. Plant in sun to light shade, 12–18" apart. Taproot can make it tricky to transplant. Avoid wet soil where it will not thrive. Perennial, Zones 3-8. ~1,100 seeds/g. ③
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