Invasive Plant Rules in Weld County, CO (2026)
1 county-level rule, plus city-specific rules for 1 city in Weld County, Colorado.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Weld County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Prohibited Species
Weld County Code § 23-5-520(A)(3) bars five plant types from any landscaping design inside the I-25 Overlay District: cotton-bearing cottonwood, Siberian elm, Chinese elm, Tree of Heaven, and any noxious weed. The list applies whenever a development plan needs county landscaping approval along the I-25 corridor.
Weld County Bans 5 Landscaping Plant Types
Some RestrictionsWeld County Code § 23-5-520(A)(3)
3.The following plant materials shall not be included in the landscaping design:a.Cotton-bearing cottonwood (Populus).b.Siberian elm (Ulmus pumila).c.Chinese elm (Ulmus parvifolia).d.Tree of Heaven (Ailanthus altissima).e.NOXIOUS WEEDS.
Invasive Plant Rules by City in Weld County
1 cities in Weld County have their own invasive plant rules rules. Each link goes to that city's dedicated page with code citations.
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