Invasive Plant Rules in Montana (2026)
2 rules on the books across Montana, 2 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
Prohibited Species
Plants that are banned or regulated in your area, including Japanese knotweed, kudzu, purple loosestrife, and other species that threaten native ecosystems.
Billings
Some RestrictionsBillings' planning division keeps a prohibited plant list, and any species on it cannot be used in landscaping required…
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Some RestrictionsYellowstone County's Zoning Code doesn't ban individual plant species, but Section 27-1203.B.1 requires that any plant…
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