Longmont follows the Colorado Noxious Weed Act (CRS 35-5.5) and the city's Integrated Weed Management Plan. The state's 98-species Noxious Weed List includes 25 species (List A) requiring complete eradication. Locally, weeds and grasses on private property cannot exceed 12 inches per Longmont Code Enforcement.
Longmont's weed authority comes from two stacked sources. (1) The Colorado Noxious Weed Act (CRS 35-5.5) requires every landowner — public and private — to manage state-listed noxious weeds. The state list classifies 98 species: List A (~25 species) must be eradicated, List B must be managed to stop spread, and List C is recommended for control. (2) Locally, Longmont Code Enforcement enforces a 12-inch maximum height for weeds and grasses citywide. The City's Integrated Weed Management Plan (updated 2024) governs City-owned land and identifies priority species in Appendix G. The City uses an Integrated Pest Management approach prioritizing mechanical, cultural and biological controls before herbicide. Parks Weed Management: 303-651-8416.
Failure to control state-listed noxious weeds can lead to county/state enforcement orders requiring abatement at the owner's cost. Locally, exceeding 12 inches in height triggers a written abatement notice and, on noncompliance, City-contracted mowing assessed as a property lien plus a municipal citation.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Longmont, CO
Longmont has no bamboo-specific ordinance. Bamboo is not listed on the Colorado Noxious Weed list and does not appear in Longmont's Integrated Weed Managemen...
Longmont, CO
Per LMC § 15.04.050(D)(4), Longmont food trucks may operate only in non-residential zoning districts (ice cream vendors are allowed in residential zones), mu...
Longmont, CO
Operating a food truck or pushcart in Longmont requires an annual Mobile Retail Food Vending Permit from the Building Services Division, plus a Longmont busi...
Longmont, CO
Federal law (FAA Part 107 and 49 U.S.C. § 44809 for recreational flyers) governs U.S. airspace and Longmont cannot regulate altitude or flight paths. The Cit...
Longmont, CO
Under LMC 6.44.090 (cited by Longmont Code Enforcement), no garage sale in Longmont may run for more than 3 consecutive days, and no more than 12 total days ...
Longmont, CO
Under LMC § 9.04.130, Longmont requires the owner, agent, or tenant of any lot to clear snow, sleet, ice, or other obstruction from the public sidewalk abutt...
Side-by-side rule comparisons with other cities in Boulder County.
See how other cities in Boulder County handle weed ordinances.
See how Longmont's weed ordinances rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.