Invasive Plant Rules in Boulder, CO (2026)
1 verified invasive plant rules for Boulder, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Prohibited Species
Boulder caps state-listed noxious weeds at twelve inches on any lot, developed or vacant, plus the sidewalk, street, or alley strip next to it. Weeds on Colorado's List A must be eradicated entirely, no matter how tall. The city manager enforces the limit under Boulder Revised Code (B.R.C.) 1981 Section 6-2-3, following the notice and hearing procedure in Chapter 1-3.
Boulder's Noxious Weed Height and Eradication Rule
Some RestrictionsBoulder Revised Code (B.R.C.) 1981 § 6-2-3
(a)No owner, lessee, agent, occupant, or person in possession or control of any occupied or unoccupied lot or tract of land or any part thereof in the city shall permit or maintain on any such lot or tract of land or along the sidewalk, street, or alley adjacent thereto any growth of state-listed noxious weeds to a height greater than twelve inches. All Colorado Department of Agriculture List A...
Looking for Boulder County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Boulder city rules.
Invasive Plant Rules in Boulder County →