Solano County, CA Landscaping Rules: Weed Ordinances (2026)

Solano County does not have a standalone 'Weed Ordinance' chapter. Weed control runs through three pathways. First, the Solano County Agricultural Commissioner operates the Solano Weed Management Area, a partnership program that maps and treats high-priority invasive species - yellow starthistle, perennial pepperweed (whitetop), medusahead, Italian thistle, and others - under authority of California Food & Agricultural Code Sections 5001-5026, which allow the Commissioner to abate and bill for noxious-weed control. Second, for overgrown vacant lots in unincorporated areas, Solano County Code Enforcement uses the nuisance-abatement procedures of California Government Code Sections 39561-39588: notice to the owner, hearing if requested, abatement at owner expense, and recovery as a tax lien. Third, in or near State Responsibility Areas the Public Resources Code Section 4291 defensible-space requirements override the basic abatement model with stricter dry-grass clearance standards enforced by CAL FIRE. Within the seven incorporated cities, each operates its own weed-abatement program on a seasonal cycle. Pesticide use for weed control is enforced by the Solano County Agricultural Commissioner under California Food & Agricultural Code Section 11401 et seq.