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PlantFiles: Balloon Flower, Chinese Bellflower, Japanese Bellflower
Platycodon grandiflorus 'Hakone Blue'

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Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Platycodon (plat-ee-KO-don) (Info)
Species: grandiflorus (gran-dih-FLOR-us) (Info)
Cultivar: Hakone Blue

4 vendors have this plant for sale.

5 members have or want this plant for trade.

Category:
Perennials

Height:
24-36 in. (60-90 cm)

Spacing:
12-15 in. (30-38 cm)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Danger:
Unknown - Tell us

Bloom Color:
Medium Blue

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Blue-Green

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

Click thumbnail
to view:

By LilyLover_UT
Thumbnail #1 of Platycodon grandiflorus by LilyLover_UT

By LilyLover_UT
Thumbnail #2 of Platycodon grandiflorus by LilyLover_UT

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive Clint07 On Aug 22, 2014, Clint07 from Bethlehem, PA wrote:

I'm not certain which variety of balloon flower I've just dug up, but the height and color approximate Hakone Blue. After having it perform well for about a decade, I dug it up to make room for something taller. That revealed why these have the reputation of being hard to transplant: the pieces of the root system weighed over 3.5 pounds, with the mass looking like a cross between a celery root bulb and baptisia roots, or like Medusa X Gordion Knot. I'll put the bigger pieces in the ground in a more suitable spot to see if they'll produce anything.



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