Platycodon grandiflorus ‘Mariesii’

(Balloon Flower, Blue)


Hardiness Zones:

 3a  3b  4a  4b  5a  5b  6a  6b  7a  7b  8a  8b

Quick Overview:

Balloon flower is a clump-forming perennial that is so named because its flower buds puff up like balloons before bursting open into outward-to-upward-facing, bell-shaped flowers with five pointed lobes. Plants are native to slopes and meadows in China, Japan, Korea and Siberia. Purple-blue flowers (to 2-3? across) bloom throughout summer, singly or in small clusters, atop stems typically growing to 30? tall. Ovate to lance-shaped, toothed, blue-green leaves (to 2? long).

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Best grown in light, medium moisture, organically rich, well-drained loams in full sun to part shade. Avoid wet or poorly-drained soils. Plants are easily grown from seed. Division and transplanting are possible but tricky because of the fragile, fleshy root systems of these plants, and it is probably best to leave plants undisturbed once established. Deadheading spent flowers generally prolongs the bloom period. New season plant stems emerge late in spring, so gardeners must be careful not to damage crowns by early cultivation (leaving old plant stems in place throughout winter to the point when the new growth first appears helps mark plant locations). Taller plants often need to be staked because of floppy stems. Consider cutting back plant stems by 1/2 in May to reduce plant height and possibly avoid staking.

Additional information

Common Name

Balloon Flower, Blue

Botanical Name

Platycodon grandiflorus 'Mariesii'


1 gallon

Evergreen or Deciduous


Hardiness Zone

3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b

Growth Rate


Light Requirements

Part-sun, Sun


2.5 ft.


2 ft.

Soil Condition


Water Needs


Blooming Period

late Spring and summer

Flower Color

blue, purple



Foliage Color


Deer Resistant


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