Clustered bellflower (Campanula glomerata) is a flowering plant native to Britain and Japan. The Latin name Campanula glomerata means "small bell." The cultivar Superba has received the Royal Horticultural Society's Award of Garden Merit.
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Perennial
Lifespan
Herb
Plant Type
Mid spring, Late spring, Summer
Bloom Time
Early summer, Mid summer
Harvest Time
20 cm to 90 cm
Plant Height
30 cm to 90 cm
Spread
Green
Leaf Color
12 cm
Flower Size
Cream, Brown, Tan
Fruit Color
Purple, Blue, White, Violet
Flower Color
Summer
Growth Season
Rapid
Growth Rate
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Distribution
Culture
Cultivars
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Care Guide
FAQs
Common Diseases
Images of Clustered bellflower
Distribution of Clustered bellflower
Distribution Map
Clustered bellflower is native across temperate Eurasia and has been introduced in the US and Canada. Its native habitat includes open forests, woodland edges, and dry grasslands. It is considered an invasive species in Alaska.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Grassy places on calcareous soils
Hemisphere Trend Curve
Northern
Sorthern
Culture
Garden Use
Clustered bellflower is a beautiful, easy-to-grow enhancement to add a splash of purple to a garden. Its multiple bloom stalks and rapid spread provide excellent borders. It also grows well in outdoor containers or rock gardens. Combine with other Bellflower species for added color interest.
Symbolism
Gratitude
Name Story
Clustered bellflower: The flowers look like a cluster of small trumpets crowding around the stem. The genus name campanula meaning small bell refers to the bell-shape of the flower. While the specific epithet refers to the tight group of flowers at the top of the stem. Therefore, it is called clustered bellflower.
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Cultivars
There are several recognized cultivars of Clustered bellflower, including the following common varieties :
Water:
Adapted to moderate climates, clustered bellflower prefers consistent moisture and well-drained soil. Water weekly and increase during the active growing season to enhance flowering. As a robust herbaceous perennial, clustered bellflower thrives outdoors and can tolerate temporary dry spells.
Fertilize:
For optimal growth, clustered bellflower requires balanced fertilization, beginning with a 10-10-10 formula in spring and shifting to 10-20-10 during blooming. Apply every 4-6 weeks, reducing in fall. Water thoroughly post-fertilization to aid nutrient absorption and prevent toxicity.
Pruning:
Clustered bellflower is a clump-forming perennial with bell-shaped flowers. Prune in early spring to remove dead stems, promote new growth, and enhance blooms. Regular deadheading and cutting back spent stalks maintain health, improve air circulation, and reduce disease risk for vigorous seasonal displays.
Propagation:
With vibrant violet-blue flowers, clustered bellflower enhances garden aesthetics. Propagate via cuttings using healthy stems and rooting hormone in well-draining soil. Maintain moisture until established, making propagation an easy and rewarding method for increasing clustered bellflower in gardens.
Repotting:
Repot clustered bellflower every 2-3 years in spring to support its expansive roots, using a slightly larger pot. After repotting, firm the soil and maintain moisture. A sunny location post-transplant promotes thriving growth and annual blooming.
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