Fairfield, CA Invasive Plant Rules: Prohibited Species (2026)

2. 8(a)(1) lists plant-material criteria a covered project must address, from selecting climate-suited species to banning high water-use plants from street medians outright under subsection (E). Invasive species get softer treatment: subsection (G) flags that using species drawn from the California Invasive Plant Council's list is strongly discouraged, without attaching a prohibition, permit condition, or removal duty to that choice. 3 separately defines "invasive plant species" as species not historically found in California that spread beyond cultivated areas and can damage environmental or economic resources, and notes such species may be regulated by county agricultural agencies as noxious weeds, pointing to the California Invasive Plant Inventory and the USDA's invasive and noxious weeds database as reference lists.

That county-agricultural-agency channel, not the city's landscape ordinance, is where an actual noxious-weed designation and any real enforcement would originate. The city's own hard numeric limit in this chapter is the Maximum Applied Water Allowance, which governs how much water a landscape may use regardless of what species are planted.