In 1975, the city of Helena adopted the weed ordinance. Since then the ordinance has been updated incorporating state law and costs for control and addressing native plant communities and noxious weeds. As more knowledge is gained regarding noxious weeds and the importance of control, more changes may be necessary. Enforcement of the ordinance is April 30 through October 31 of each year.

• Sprayed over 410 acres of city owned property.
• Processed over 460 weed complaints.
• Disposed of over 600 pounds of noxious weeds through weed pulls.
• Currently have 104 biological control sites where insects are used to control noxious weed infestations.