Invasive Plant Rules in Longmont, CO (2026)
1 verified invasive plant rules for Longmont, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Prohibited Species
Longmont declares ragweed, thistle, knapweed, bindweed, dandelion and any state-listed Type A, B or C noxious weed a public nuisance on any lot in the city, and § 9.32.010 requires the owner to remove them.
Longmont Noxious Weed Removal Requirement
Significant RestrictionsLongmont Municipal Code § 9.32.010
Any weeds, such as ragweed, thistle, knapweed, bindweed, dandelion or any Type A, B or C list noxious weeds, as classified by the state Noxious Weed Act (C.R.S. § 35-5.5-101 et seq), found growing in any lot or tract of land in the city, are a public nuisance and shall be removed.B.It is unlawful for any person owning or having possession of any land, including any abutting the public right-of-...
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County ordinances apply to unincorporated areas and may supplement Longmont city rules.
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