Loveland, CO Landscaping Rules: Weed Ordinances (2026)

Loveland's Title 16 (Nuisances), consolidated in 2020, makes it a nuisance to allow weeds listed by the Colorado Department of Agriculture as harmful to grow or remain on private property. The state framework is the Colorado Noxious Weed Act (CRS 35-5.5-101 et seq.), which delegates noxious-weed designation and management to the Colorado Department of Agriculture's Conservation Services Division. List A species (e.g., African rue, meadow knapweed, myrtle spurge, purple loosestrife) require statewide eradication; List B species (e.g., Canada thistle, diffuse knapweed, leafy spurge, Russian olive, yellow toadflax) require management to prevent spread; List C species (e.g., common mullein, cheatgrass, downy brome) are recommended for management with local discretion. Larimer County Weed District participates in state coordination and provides cost-share programs to landowners. Loveland Title 16 enforcement mirrors its grass-height process: written, mailed warning with seven days to abate; if uncorrected, the City completes the work, bills cost-plus-10%, with an additional 10% penalty after 30 days, and places the unpaid charge on the Larimer County tax roll. Title 16's weed definition excludes flower gardens, vegetable gardens, hay crops, small-grain plots, turf grasses, ornamental grasses, native grasses, industrial hemp and marijuana — meaning xeriscape and native-meadow plantings are not captured by routine nuisance enforcement when they qualify as ornamental or native grasses.