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Plant Guide
Yellow Bellflower (Campanula thyrsoides) photo by Gaby Åhnström        

Campanula thyrsoides


Pronunciation: kam-PAN-yoo-luh thurs-OY-deez
Family: Camanulaceae
Common Name: Yellow Bellflower
Plant Type:
  • biennial
  • perennial

Height to: 20"
Width to: 12"
USDA Hardiness Zones:
  • -10 to -20ºF ZONE 5
  • 0 to -10ºF ZONE 6
  • 10 to 0ºF ZONE 7
  • 20 to 10ºF ZONE 8

Bloom Description: Yellow Bellflower (Campanula thyrsoides) bear dense, blunt tipped, cylindrical spikes of cup shaped, fragrant, lemon yellow or creamy yellow flowers, 1/2-1" long.
Bloom Season:
  • mid summer
  • late summer

Sun Exposure:
  • part sun

Soil Type: Yellow Bellflower (Campanula thyrsoides) prefer fertile, neutral to alkaline, moist but well drained soil.
Plant Perks:
  • Fragrant

Pests and Diseases: Yellow Bellflower (Campanula thyrsoides) are prone to slugs and snails, spider mites and aphids. They are also susceptible to powdery mildew, rust, leaf spots and Southern blight.
Propagation: Sow Yellow Bellflower (Campanula thyrsoides) seeds in containers in spring. Divide in spring or autumn. Take basal cuttings in spring.
Winter Sowing Zones: zone 5-8
Native to: Yellow Bellflower (Campanula thyrsoides)
Notes:

Yellow Bellflower (Campanula thyrsoides) is a rosette-forming, bristly, biennial or monocarpic perennial with lance shaped, wavy margined, entire mid green leaves, 3-5" long, the upper ones much narrower and stem clasping.

Source: Various sources including The American Horticultural Society A to Z Encyclopedia of Garden Plants


USDA Heat Zones (days above 86ºF):
  • 30 to 45 days ZONE 5
  • 45 to 60 days ZONE 6
  • 60 to 90 days ZONE 7
  • 90 to 120 days ZONE 8

Submitted by: distantkin
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