Balloon-flower is a hardy herbaceous perennial with bell-shaped blue flowers and balloon-like buds, the only species in its genus. It dies back fully in winter and rewards a sunny, well-drained spot with flowers in summer.
Family
Campanulaceae (Campanul family)
Grows as
Perennial
Light
Full sun, Part shade
Water
Water regularly during dry spells in the growing season; let the top of the soil dry slightly between waterings.
Soil
Moist but well-drained, fertile garden soil or loam.
Temperature
Hardy to −40 °C; comfortable in cool to warm summers; USDA zones 3 to 9.
How easy
Easy
Native range
SE. Siberia to Japan and China
Climate
temperate
About
Platycodon grandiflorus (from Ancient Greek πλατύς (platús), meaning "flat", and κώδων (kódon) meaning "bell") is a species of herbaceous flowering perennial plant of the family Campanulaceae, and the only member of the genus Platycodon. It is native to East Asia (China, Korea, Japan, and the Russian Far East). It is commonly known as balloon flower (referring to the balloon-shaped flower buds), Chinese bellflower, or platycodon.
How to grow it
This plant is hardy down to −40 °C (−40 °F), and can be cultivated in USDA zones 3A to 9b. It dies down completely in winter, reappearing in late spring and flowering in summer. However, plants are widely available from nurseries in full flower from April onwards.
Though the species has blue flowers, there are varieties with white, pink, and purple blooms. In Korea, white flowers are more common. This plant, together with its cultivars 'Apoyama group' and 'Mariesii', have gained the Royal Horticultural Society's Award of Garden Merit.
Where it grows
Platycodon grandiflorus is a perennial plant which is commonly grown in mountains and fields. It is 40 to 100 centimeters (16 to 39 in) high and has thick roots, and white juice comes out when the stem is cut. Leaves are 5 to 12 centimeters (2.0 to 4.7 in) long, with narrow ends and teeth on the edges.
Text excerpted from the Wikipedia article Platycodon by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.