Platycodon grandiflorus 'Hakone Blue'
The balloon flower (Platycodon grandiflorus 'Hakone Blue') is a beautiful herbaceous perennial that belongs to the Campanulaceae family. This low-maintenance plant is an excellent addition to the garden with its exquisite, brilliant blue flowers in bell-shaped blooms. The spherical buds of the balloon flower open in late spring and develop into vibrant domed blooms that last until late summer. This plant requires full sun and well-drained, dry soil, and is an ideal candidate for the rock garden or flower bed. The Hakone Blue cultivar is noted for its exceptional color, and with its easy care and moderate size, it can be enjoyed for many years as a stand-alone specimen or in clusters.
Sunlight
Partial Shade
Water Needs
medium
Green areas show climates worldwide where this plant can grow.
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Water Every
"3-4" days
Sun Needs
partial-shade
Growth
Low
Care Level
Low
💧 Water every "3-4" days
Seasonal Adjustments
Adjust watering frequency based on temperature, humidity, and season. Water more frequently in summer and less in winter.
Pro Tip: Check soil moisture before watering. Stick your finger 1-2 inches into the soil—if it's dry, it's time to water!
Divide root ball in spring, replant sections immediately
Take 4-6" cuttings in spring, root in water or moist soil
Start seeds indoors 6-8 weeks before last frost date
Bend stem to soil surface, cover lightly, roots form in 4-6 weeks
Good For:
Consider Carefully:
Enjoys dappled or limited direct sun—about 2–4 hours of morning or late afternoon light and protection during peak midday sun.
Keep soil consistently moist but not waterlogged. Water when top inch of soil is dry.