Parker, CO Landscaping Rules: Weed Ordinances (2026)

Section 6.01.260(a) defines developed property as land substantially improved with structures, landscaping or hardscape in residential or nonresidential zones, excluding agricultural land, and requires every owner, agent and occupant to keep it from becoming overgrown with weeds, including federally and state-listed noxious weeds and common plants like ragweed, milkweed, mustard and Russian thistle; brush or grass over twelve inches is itself a code violation. The rule exempts natural grasses in open space, landscape or decorative grasses, flower and vegetable gardens, xeriscape plantings, and agricultural crops such as hay or forage on agriculturally zoned land.

Section 6.01.260(c) requires an integrated weed-management program of reseeding, herbicide application, mowing and mechanical removal; mowing alone or leaving bare ground does not satisfy the requirement. Town Council may, by resolution under Section 6.01.260(d), exempt natural open space, passive common areas, conservation areas, erosion-control areas or drainage ditch rights-of-way. Enforcement runs through Section 6.01.060(3), which treats weed control as a criminal nuisance violation that Neighborhood Services may instead resolve through a penalty assessment schedule.