Invasive Plant Rules in Issaquah, WA (2026)
1 verified invasive plant rules for Issaquah, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Prohibited Species
Issaquah's landscaping standards bar any class of noxious weed from plantings, including nonregulated weeds and weeds of concern on the King County Noxious Weed Control Board list. Tree species must also be selected from the City preferred and prohibited tree list.
Issaquah Noxious Weed Ban in Required Landscaping
Significant RestrictionsIssaquah Land Use Code § 18.606.040(E)(4)
4. Plants must be selected that are appropriate for the provided space to minimize persistent pruning. Any class of noxious weeds, including nonregulated weeds and weeds of concern, per the King County Noxious Weed Control Board pursuant to the State Weed Control Law, Chapter 17.10 RCW, is not allowed. ... 6. Tree species must be selected from the City preferred and prohibited tree list.
Looking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Issaquah city rules.
Invasive Plant Rules in King County →