Invasive Plant Rules in Thurston County, WA (2026)
1 rule for unincorporated Thurston County, Washington.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Thurston County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Prohibited Species
Thurston County does not print a fixed list of banned invasive plants in its own code; instead it defines a 'noxious weed' as any plant on the county noxious weed list adopted under RCW 17.10.090, and lets the Noxious Weed Control Board designate specific ones as 'target species' requiring containment.
Thurston County Target Noxious Weed Species Rule
Some RestrictionsThurston County Code §§ 17.30.030, 17.30.040
17.30.030 - Definitions. "Noxious weed" means a plant listed on the Thurston County noxious weed list adopted pursuant to RCW 17.10.090. "Target species" means a noxious weed listed on the Thurston County noxious weed list that the noxious weed control board has determined may be better controlled by requiring containment measures and/or management standards for areas where the noxious weed has...
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