Weeds in Brentwood: Can You Help?
Recommended non-chemical removal methods.
• Learn more at abinvasives.ca/
• www.calgary.ca/parks/pests/invasive-plants.html
• Dispose of all removed plant parts by bagging and putting directly in the black cart (never compost weeds).
Creeping Bellflower
Creeping Bellflower. Photo by Elizabeth J. Czarapata
1. Digging
• Deep and thorough: Dig at least six to eight inches deep and several inches around the plant to remove the entire root system.
• Use a garden fork: This helps loosen the soil and avoid breaking off roots.
• Inspect the soil: Check for any remaining root pieces or leaves, as they can regenerate.
• Dispose of roots properly: Bag all removed plant parts and dispose of them in the general waste (not in compost).
2. Smothering
• For small patches. This method is most effective when the bellflower is contained in a limited area.
• Cover with newspaper and mulch: Lay down several layers of newspaper or cardboard, then cover with a thick layer of mulch, like wood chips or straw.
• Deprive of light: This will eventually kill the plant, but it may take several months
• Avoid introducing this plant to your yard through wildflower seed mixes.
Western Goat Beard/Yellow Salsify and Canada Thistle
Canadian Thistle
Western Goat Beard
1. Hand-pulling
• Best done when the soil is moist after rain, making it easier to remove the entire root.
• Use a shovel or spade to dig a wide trench around the plant, ensuring the root ball remains undamaged.
• Gently lift the plant out, avoiding pulling to prevent breakage.
• Pull early, pull often.
2. Mowing
• Regular mowing can prevent yellow salsify and Canadian Thistle from producing flowers and seeds.
• Cut the plant before it goes to seed to significantly reduce its ability to spread.
• Canadian Thistle, like Creeping Bellflower, is very hearty, and may take many attempts to eradicate. The City of Calgary, UofA, and other sources recommend professional chemical treatment for large infestations.
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