igorous and floriferous, Platycodon grandiflorus 'Astra Double Blue' (Balloon Flower) is a dwarf herbaceous perennial which produces an abundance of fully double, bell-shaped, periwinkle blue flowers, up to 3 in. across.
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Type: Herbaceous perennialZone: 3 to 8Height: 0.25 to 0.50 feetSpread: 0.25 to 0.50 feetBloom Time: June to AugustBloom Description: BlueSun: Full sun to part shadeWater: MediumMaintenance: LowFlower: Showy