Invasive Plant Rules in Los Angeles County, CA (2026)

1 county-level rule, plus city-specific rules for 6 cities in Los Angeles County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Los Angeles County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Prohibited Species

The LA County Agricultural Commissioner maintains a list of noxious weeds and invasive plant species. California's noxious weed list (Food & Agriculture Code §5004) applies countywide. Additionally, the county's landscaping and water-efficient ordinance discourages high-water-use ornamental species.

LA County Prohibited and Invasive Plant Species

Some Restrictions

California Food and Agricultural Code Sec. 5004 (Noxious Weed Definition)

5004. 'Noxious weed' means any species of plant that is, or is liable to be, troublesome, aggressive, intrusive, detrimental, or destructive to agriculture, silviculture, or important native species, and difficult to control or eradicate, which the director, by regulation, designates to be a noxious weed. In determining whether or not a species shall be designated a noxious weed for the purpose...

Full ordinance details →Official source ↗