Invasive Plant Rules in Janesville, WI (2026)
2 verified invasive plant rules for Janesville, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
Prohibited Species
In the City of Janesville, Sec. 22-204(a) names 24 specific plants as noxious weeds regardless of how tall they grow, including buckthorn, Canada thistle, garlic mustard, purple loosestrife, and marijuana, on top of the state's own noxious-weed and invasive-species definitions in Wis. Stat. §§ 66.0407 and 23.22.
Janesville's 24 Named Noxious Weed Species
Significant RestrictionsJanesville Code of General Ordinances § 22-204(a)
In addition to the state statute definition for noxious weeds (Wis. Stats. § 66.0407) and Invasive Species (Wis. Stats. § 23.22) noxious weeds shall include, but is not limited to, the following list of species:(1)Buckthorn (Rhamnus cathartica).(2)Bull Thistle (Cirsium vulgare).(3)Burdock (Arctium minus).(4)Canada Thistle (Cirsium arvense).(5)Dame's Rocket (Hesperis matronalis).(6)Field Bindwee...
Front Yard Gardens
In the City of Janesville, Sec. 22-206 lets residents plant gardens but keeps them out of the yard perimeter clearance, at least two feet from front, rear, and side lot lines, bans corn in front and corner-side setbacks, and caps screening plants at 30 inches tall in those setback areas.
Janesville Front-Yard Garden Setback Rules
Some RestrictionsJanesville Code of General Ordinances § 22-206
(a)Yard perimeter clearance. All gardens must be located outside the yard perimeter clearance. The yard clearance shall be a minimum of two feet from front, rear, and side property lines. No clearance is required where garden areas abut a fence or similar barrier separating it from adjoining residential areas.(b)Neglect. Gardens shall remain managed and free of noxious weeds.(c)Restrictions.(1)...
Looking for Rock County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Janesville city rules.
Invasive Plant Rules in Rock County →