Photo by Melody

PlantFiles: Clustered Bellflower
Campanula glomerata 'Superba'

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Campanula (kam-PAN-yoo-luh) (Info)
Species: glomerata (glahm-er-AH-tuh) (Info)
Cultivar: Superba
Additional cultivar information: (aka Dahurica)

Synonym:Campanula glomerata var. dahurica

5 vendors have this plant for sale.

13 members have or want this plant for trade.


24-36 in. (60-90 cm)

15-18 in. (38-45 cm)
18-24 in. (45-60 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:

Bloom Time:
Late Spring/Early Summer
Mid Summer


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

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:

Propagation Methods:
By dividing the rootball

Seed Collecting:
Unknown - Tell us

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There are a total of 20 photos.
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6 positives
No neutrals
No negatives

Gardeners' Notes:

Positive chrystypas On Jul 31, 2012, chrystypas from Bessemer Bend, WY wrote:

Birds must have dropped seed-did not plant this. High plains area of central Wyoming. Does beautifully in full sun, another seed must have been dropped in an area that gets afternoon shade-does bloom, but not quite as prolific as full sun.

Positive anelson On Aug 10, 2011, anelson from Birchwood, WI (Zone 3b) wrote:

The cobalt blue of this plant is breathtaking when in bloom. I have an easier time growing this in Wisconsin where the nights are cool and the soil is more acidic than I do in Nebraska. It is not particularly attractive when not in bloom so it is a good idea to plant it somewhere where the low leaves will be hidden when the bloom stalks have been removed.

Positive Lindablu99 On Jun 30, 2010, Lindablu99 from Woodstock, NY wrote:

I put in a single campanula golmerata superba last year. I was not familiar with this plant but wanted something purple. It didn't bloom the first year but produced beautiful flower clusters this year! My only surprise was that the flowers were a very light blue, almost white. Then, a second group of taller stems bearing dark purple flowers starting appearing as the white clusters started dying off.

Is this normal? What would cause the plant to produce two different colors? Gorgeous but a curiosity!

Positive joegee On Jun 25, 2008, joegee from Bucyrus, OH (Zone 6a) wrote:

The flowers of this plant are a shockingly pure purple. The only other purple flowers I have seen that have this color are on bougainvilleas. This plant prefers full sun, and is drought resistant.

Positive smiln32 On Aug 30, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Summer blooms of large deep violet clusters of bells atop dark green foliage. Adored by hummingbirds and butterflies.

Positive RubyStar On Jun 11, 2003, RubyStar from Madison, WI (Zone 5a) wrote:

Definitely one of my faves in the garden. Takes awhile to establish, but very much worth the wait. Once it is established it does not require staking, if grown in proper conditions. In my experience it does better in part sun than in full sun; definitely needs a little protection during the blazing afternoons. Tolerates average water (min 1"/wk) but is happier when you're a little more generous with the water. Likes fertile soil w/organic matter.

This cultivar is distinct from the species for its taller flower stalks (30" avg in my garden) with very prominent round clusters of dark purple flower heads. Blooms over a long period of time -- as upper clusters finish, the lower ones take over the show.

A very nice plant that is easy to grow and very pleasurable to see in bloom once established.


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

Anchorage, Alaska
Flagstaff, Arizona
South Lake Tahoe, California
Augusta, Georgia
Franklin Grove, Illinois
Mount Prospect, Illinois
Wilmette, Illinois
Bloomfield, Iowa
Davenport, Iowa
Smiths Grove, Kentucky
Norton, Massachusetts
Winchester, Massachusetts
Caro, Michigan
Constantine, Michigan
Midland, Michigan
Owosso, Michigan
Minneapolis, Minnesota
Saint Louis, Missouri
Lincoln, Nebraska
Annandale, New Jersey
Elba, New York
Greene, New York
Southold, New York
Woodstock, New York
Matthews, North Carolina
Bucyrus, Ohio
Columbus, Ohio
Corning, Ohio
Monmouth, Oregon
Freedom, Pennsylvania
Leesburg, Virginia
Kalama, Washington
Port Townsend, Washington
Spokane, Washington
Vancouver, Washington
Birchwood, Wisconsin
Casper, Wyoming

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