Platycodon 'Astra Blue' is a striking balloon flower cultivar known for its large, star shaped bright blue blooms. This compact perennial is valued for its long lasting flowers and easy maintenance, making it a favorite for borders and gardens.
Height & Spread: 18 - 24 in x 18 - 24 in
Bloom Time: Mid to late summer
Light Requirements: Full sun to part shade
Soil Preference: Well drained, fertile soil with moderate moisture
Watering Needs: Moderate; regular watering encourages continuous blooming
Deer Resistance: Moderate
Native Status
Native to East Asia, Platycodon grandiflorus is prized in ornamental gardens worldwide. This is a popular cultivar selected for its vivid blue flowers and compact habit.
Wildlife & Insects
Butterflies
- Attracts swallowtails and skippers seeking nectar from its open bellshaped flowers.
Bees
- Visited by native bumblebees and honeybees collecting pollen and nectar.
Hummingbirds
- Occasionally drawn to the bright blue blooms for nectar.
Spacing & Landscape Use
Spacing Recommendations
- Space plants 18 - 24 in apart to allow for full growth without overcrowding.
Landscape Placement
- Ideal for borders, rock gardens, and containers where vibrant color is desired.
Companion Plants
- Coreopsis verticillata (Threadleaf Coreopsis) - Adds fine textured foliage and contrasting yellow blooms.
- Salvia nemorosa (Woodland Sage) - Provides deep violet flower spikes that complement the blue blooms.
- Lavandula angustifolia (English Lavender) - Offers fragrant foliage and silvery contrast to balloon flower leaves.
- Gaillardia aristata (Blanket Flower) - Adds bright red and yellow flowers for summer color variety.
- Echinacea purpurea (Purple Coneflower) - Attracts pollinators and provides complementary purple blooms.