From the City of Calgary’s website:
Creeping bellflower’s pleasing look is often mistaken for a desirable garden plant but is actually quite invasive and can aggressively invade lawns and gardens.
What can I do to stop the spread of creeping bellflower?
- Remove plants as they appear in your yard by digging out as much root as possible.
- Avoid introducing this plant to your yard through wildflower seed mixes and potted plants (ensure purchased Campanula species are NOT C. rapunculoides).
- Dispose of all removed plant parts by bagging and sending to the landfill (never compost this species!).
Read more on the City of Calgary’s website: http://www.calgary.ca/CSPS/Parks/Pages/Planning-and-Operations/Pest-Management/Creeping-bellflower.aspx