Hardiness ratings: USDA zone 3~3b - 8
- Wikipedia. Online encyclopedia entry (if defined).
- Google images. Web search for photographs.
- GRIN. Taxonomical details, with common names, distribution, and synonyms.
- The Plant List. Taxonomical lookup
Links for Campanula thyrsoides
- All Things Plants - Community-assembled plant profile (8 photos)
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3b-8) (4 photos)
- NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (2 photos)
- Ontario Rock Garden Society - Germination information (additional information for other varieties)
- Rob's Plants - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (zone 3-8)