Invasive Plant Rules in St. Louis County, MO (2026)
1 county-level rule, plus city-specific rules for 1 city in St. Louis County, Missouri.
Verified from official government sources
Prohibited Species
Even where St. Louis County lets a property owner grow a managed natural landscape taller than the normal 8-inch mowing limit, Section 620.115 draws a hard line at species: noxious weeds and invasive or nuisance plants are barred outright, regardless of height, under the Managed Natural Landscapes Code, which pulls its species definitions straight from the county's Weed Control Code.
St. Louis County Invasive Plant Prohibition
Significant RestrictionsSLCRO §§ 620.115, 619.005 (incorporated by §620.005)
(b)Managed natural landscapes may include plants and grasses in excess of eight (8) inches in height and which have gone to seed, but may not include any noxious weeds or nuisance or invasive plants, and must be maintained so as to not include unintended vegetation. (c)Managed natural landscapes may not include any noxious weeds, nuisance or invasive plants, or any other plantings, which due to...
Invasive Plant Rules by City in St. Louis County
1 cities in St. Louis County have their own invasive plant rules rules. Each link goes to that city's dedicated page with code citations.
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