Platycodon grandiflorus 'Astra Double Blue' | Astra Double Blue Balloon Flower
This new introduction of an old time perennial garden favorite produces boldly-sized double flowers that open from balloon-shaped buds. Excellent cold-hardiness and a compact, uniform habit. Reliable, disease-free performer.
Exposure: Sun/Part Shade Bloom Time: Summer Height x Width: 8-10" x 6-8" Hardiness: -40°C to -34°C USDA Zone: 3