Balloon Flower, Chinese Bellflower, Japanese Bellflower 'Sentimental Blue'

Platycodon grandiflorus

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Platycodon (plat-ee-KO-don) (Info)
Species: grandiflorus (gran-dih-FLOR-us) (Info)
Cultivar: Sentimental Blue
Synonym:Campanula glauca
Synonym:Platycodon glaucus
Synonym:Campanula grandiflora
View this plant in a garden



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


6-12 in. (15-30 cm)


9-12 in. (22-30 cm)


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)

Sun Exposure:

Full Sun

Sun to Partial Shade



Bloom Color:

Medium Blue

Bloom Time:

Mid Summer

Late Summer/Early Fall



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

By dividing the rootball

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Direct sow as soon as the ground can be worked

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:


Clayton, California

Magalia, California

Paradise, California

Stockton, California

Grand Junction, Colorado

Glastonbury, Connecticut

Casselberry, Florida

Vidalia, Georgia

Cherry Valley, Illinois

Edgewood, Illinois

Mount Prospect, Illinois

Farmersburg, Indiana

Fishers, Indiana

Greenville, Indiana

Jeffersonville, Indiana

Inwood, Iowa

Wichita, Kansas

Hazard, Kentucky

Baton Rouge, Louisiana

Belle Chasse, Louisiana

Norco, Louisiana

Pollock, Louisiana

Centerville, Massachusetts

Dracut, Massachusetts

Springfield, Massachusetts

Uxbridge, Massachusetts

Worcester, Massachusetts

Farmington, Michigan

Grand Rapids, Michigan

Harrison, Michigan

Madison Heights, Michigan

Royal Oak, Michigan

Saginaw, Michigan

Traverse City, Michigan

Kasota, Minnesota

Florence, Mississippi

Madison, Mississippi

Piedmont, Missouri

Denville, New Jersey

Flanders, New Jersey

New Milford, New Jersey

Point Pleasant Beach, New Jersey

Campbell Hall, New York

Hilton, New York

Cary, North Carolina

Clemmons, North Carolina

Davidson, North Carolina

Dunn, North Carolina

Flat Rock, North Carolina

Warren, Ohio

Oklahoma City, Oklahoma

Dover, Pennsylvania

Millersburg, Pennsylvania

Spring Grove, Pennsylvania

Anderson, South Carolina

Conway, South Carolina

Aberdeen, South Dakota

Hendersonville, Tennessee

Knoxville, Tennessee

Memphis, Tennessee

Fort Worth, Texas

Georgetown, Texas

Rowlett, Texas

Tyler, Texas

Salt Lake City, Utah

Birdsnest, Virginia

Charlottesville, Virginia

Raphine, Virginia

Virginia Beach, Virginia

East Port Orchard, Washington

Freeland, Washington

Charleston, West Virginia

Fond Du Lac, Wisconsin

Janesville, Wisconsin

show all

Gardeners' Notes:


On Jun 30, 2006, prkist from Virginia Beach, VA wrote:

It came with the house here in Va Beach, VA and I nearly pulled it out as a weed this spring. So Glad I did not!! It is very petite and just so lovely. It gets 60% sun and seems totally happy with that. Thanks for telling me to deadhead to prolong the blooming. A friend saw it and identified it so I could learn more about it here. I have been gardening for 62 yrs and there is enough new info out there to see and learn about to keep me going to 100.


On Jul 2, 2005, Tjsangel from Warren, OH wrote:

This is the cutest little plant! They dont take up much space, and the buds do resemble hot air balloons before they open. It does like a little more water in really dry spells, and once established can tolerate drought. Very easy, beautiful plant to care for.


On Apr 23, 2005, se_eds from Millersburg, PA (Zone 6b) wrote:

This old fashioned favorite is one of the last to sprout up in the spring. It is easy to overlook its sprouts and pull it out for a weed!


On Oct 13, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

My oldest daughter picked this plant out for us and it really bloomed a lot at first, then slumped all summer and started back blooming again this fall. I wonder if it just doesn't like quite so much heat. It's planted in full sun here in OK.


On Apr 19, 2004, kooger from Oostburg, WI (Zone 5b) wrote:

I enjoy this plant, it spreads slowly every year and is about 2 ft. across in it's 4th year. It is a sleepyhead and is the last plant to come up in the spring. I thought it had died the first 2 years and then finally it came up! Needs deadheading.


On Nov 9, 2003, dogbane from New Orleans, LA (Zone 9a) wrote:

This plant is a hybridized native of the southern US. The native form is tall and sparse, but has the same gorgeous flowers, though a somewhat lighter color. The native is usually found in very harsh environments like sand ridges or along the edges of salty or brackish marsh. With this in mind, know that the biggest problem with cultivating Balloon Flowers is killing them with kindness. This little masochist wants to be in hot, dry, nutrient poor places and won't survive long if over tended.


On Jun 4, 2003, MartyK from Memphis, TN (Zone 7b) wrote:

It grows in full sun or dappled sun. If you deadhead, it blooms from late May til October. Mine in dappled sun reach 15-20" in height. The ones in full sun are 8-10".


On Jun 4, 2003, gabriell from Tyler, TX (Zone 8b) wrote:

I have had one balloon flower for eight years.I transplanted it from another garden and it survived.It dies back in the winter and comes back in the spring.It is blooming now a beautiful true blue.