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Balloon Flower
Platycodon
Balloon Flower blooms from July through August.
Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.
Growing Balloon Flower
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 2 ft tall and 1.3 ft wide at maturity, in roughly 2 years.
When to plant Balloon Flower
Plant Balloon Flower in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. For the middle of its hardy zones 3 to 8 range, spring means April to June and fall means August or September. Once settled, it blooms from July to August.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 5 in April.
Comes in 5 varieties across 3 colors
Same plant, same care - pick the color you are growing.
Good to know about Balloon Flower
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Worth knowing
The name is literal: the buds swell up like little hot-air balloons, then split open into upward-facing star-shaped flowers. Squeeze a plump bud and it pops. per NC State
Does soil pH matter?
NC State calls for slightly acidic soil, while Morton Arboretum says it tolerates alkaline ground. Do not chase a pH number: sharp drainage matters far more than pH here. per NC State and Morton
Plant it once, permanently
It grows from a thick, fleshy taproot that rarely survives digging, so it resents moving or division. Pick its spot for keeps and start new plants from seed. per NC State
Mark the spot in spring
It breaks dormancy very late in spring, so its patch can look empty for weeks. Mark it with a label and avoid digging, hoeing, or weeding over the crown. per Illinois and Missouri Botanical
Roots are eaten in Korea
The fleshy roots are a traditional Korean food called doraji, soaked to cut bitterness, then served in salads, soups, and seasoned side dishes, and used for respiratory complaints. per Nutrients and Frontiers in Pharmacology
Keep tall stems upright
Taller types flop and may need staking. Instead, cut stems back by about half in late May (the Chelsea chop) for shorter, bushier plants that bloom a little later. per Missouri Botanical
What pairs well with Balloon Flower
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
False Indigo
Shares full sun and low to moderate water; blooms in late spring, before this one opens; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.
Aster
Shares full sun and moderate water; blooms in early fall as this one finishes; its seed heads stand through winter, for structure and the birds; purple sits close to blue on the wheel.
Perennial Sunflower
Shares full sun and moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 4.9 ft, for the layer behind it.
Fountain Grass
Shares full sun and low to moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.
Switchgrass
Shares full sun and low to moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 4.9 ft, for the layer behind it.
Ninebark
Shares full sun and moderate water; blooms in late spring, before this one opens; taller at 6.6 ft, for the layer behind it; a soft color beside the blue.
Little Bluestem
Shares full sun and low to moderate water; overlaps, then carries the display into early fall; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.
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