Invasive Plant Rules in Casper, WY (2026)
1 verified invasive plant rules for Casper, Wyoming, sourced directly from the municipal code and official government pages.
Verified from official government sources
Prohibited Species
Casper Municipal Code § 12.32.160 bans planting cotton-bearing cottonwoods and tall willows near the North Platte River, female box elders anywhere, and any Wyoming-designated noxious weed species, including Russian olive and tamarisk, on public places within the city.
Casper Prohibited Trees and Shrubs List
Heavy RestrictionsCasper Municipal Code § 12.32.160
It is unlawful to plant or cause to be planted on public places, any of the following: ... A.Any cotton-bearing cottonwood trees; except within forty feet of the North Platte River bank.B.Any female box elder tree (acer negundo);C.Any willows with a maximum height of ten or more feet (genus salix), except within forty feet of the North Platte River bank.D.Any state of Wyoming designated weeds (...