PETRIN CUNTY NOXIOUS WEED OF THE MONTH CANADA THISTLE Canada thistle is a perennial which reproduces from both seeds and roots. The stem is hollow and smooth, and reaches 1 to 5 feet tall, branching at the top. Flowers are pale pink to lavender, sometimes purple. Canada thistle is best managed through an integrated management system that emphasizes competitive desirable plants. Canada thistle is considered an ecological problem in Pitkin County because it will reduce biodiversity over time Canada thistle emerges in June or July in most parts of Pitkin County Infestations exist in cultivated fields, riparian areas, pastures, rangeland, forests, lawns and gardens, roadsides, and in waste areas. Serious infestations exist on private land bordering Snowmass Creek and Capitol Creek, and on public land throughout the County. Appropriate timing is critical for effective chemical control of Canada Thistle. Application at bud stage or in the fall after a light frost allow for best translocation of herbicide to the plants' extensive root system To learn more about Canada Thistle and other noxious weeds in Pitkin County, please go to: https://pitkincounty.com/DocumentCenter/Vie Management-Plan-2019 1855 Please contact Liz Mauro at Pitkin County Land Management liz.mauro@pitkincounty.com at for 970-429-2887 information. more DG D Bebeeu 02007k chavka PETRIN CUNTY NOXIOUS WEED OF THE MONTH CANADA THISTLE Canada thistle is a perennial which reproduces from both seeds and roots. The stem is hollow and smooth, and reaches 1 to 5 feet tall, branching at the top. Flowers are pale pink to lavender, sometimes purple. Canada thistle is best managed through an integrated management system that emphasizes competitive desirable plants. Canada thistle is considered an ecological problem in Pitkin County because it will reduce biodiversity over time Canada thistle emerges in June or July in most parts of Pitkin County Infestations exist in cultivated fields, riparian areas, pastures, rangeland, forests, lawns and gardens, roadsides, and in waste areas. Serious infestations exist on private land bordering Snowmass Creek and Capitol Creek, and on public land throughout the County. Appropriate timing is critical for effective chemical control of Canada Thistle. Application at bud stage or in the fall after a light frost allow for best translocation of herbicide to the plants' extensive root system To learn more about Canada Thistle and other noxious weeds in Pitkin County, please go to: https://pitkincounty.com/DocumentCenter/Vie Management-Plan-2019 1855 Please contact Liz Mauro at Pitkin County Land Management liz.mauro@pitkincounty.com at for 970-429-2887 information. more DG D Bebeeu 02007k chavka