Sonora, CA Invasive Plant Rules: Prohibited Species (2026)
Key Facts
- Local Ordinance
- None specific
- State Authority
- CDFA pest ratings
- Common Invasives
- Yellow starthistle, Scotch broom, tree of heaven
- Enforcement
- County Ag Commissioner
- Guidance
- UC Cooperative Extension Tuolumne
Summary
Sonora does not maintain a specific local prohibited plant species list, but California state law regulates invasive species through the California Invasive Species Council and CDFA pest ratings. Several invasive species are problematic in the Tuolumne County foothills.
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 purposes of protecting silviculture or important native plant species, the director shall not make that designation if the designation will be detrimental to agriculture. (Amended by Stats. 1992, Ch. 556, Sec. 1. Effective January 1, 1993.)
Full Breakdown
While Sonora does not have a local prohibited species ordinance, California Department of Food and Agriculture pest ratings classify invasive plants statewide. Problematic species in the Tuolumne County foothills include yellow starthistle, Scotch broom, tree of heaven, and various invasive grasses. The Tuolumne County Agricultural Commissioner monitors and manages invasive species. Defensible space requirements under SMC Chapter 8.40 also target removal of invasive vegetation near structures. The UC Cooperative Extension in Tuolumne County provides guidance on native plant alternatives.
Violations & Fines
CDFA-rated noxious weeds may be subject to mandatory control requirements enforced by the County Agricultural Commissioner.
Frequently Asked Questions
Does Sonora have a prohibited plant species list?
What invasive plants are common in the Sonora area?
Where can I get native plant guidance for Sonora?
Sources & Official References
Other rules in Sonora
California rules heatmap·Compare Sonora to another location·View the California invasive plant rules overview
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