Westminster, CO Landscaping Rules: Weed Ordinances (2026)

defines a weed as any useless, troublesome, or injurious plant, including vegetation grown to maturity or to a height exceeding 12 inches, but exempts flower gardens, shrubbery, vegetable gardens, small grain plots, and pastures if they are adequately weeded and maintained. The ban reaches beyond the owner's own yard: it is unlawful to permit weeds to accumulate on the premises, along an adjacent sidewalk, street, or alley, between the property line and the curb (or middle of the alley), or for ten feet outside the property line where there is no curb.

, regardless of the plant's height or condition. Subsection (C) sets a six-inch cap on turf, defined as mowed grass forming a dense ground surface, and subsection (D) requires all planted material, including trees, shrubs, groundcovers, vines, and turf, to maintain a 100 percent ongoing survival rate. Weed and turf violations are one of the few offenses the City can summarily abate without prior notice, under Section 8-1-16(C)(1)(d), meaning the City Manager can order the mowing done immediately and recover the cost as a first and prior lien on the property under Section 8-1-16(C)(2). , with each day of noncompliance treated as a separate violation under Section 8-1-16(A).