Sioux City, IA Invasive Plant Rules: Prohibited Species (2026)
Key Facts
- Banned from landscape plans
- Iowa noxious/invasive-listed species
- Cannot be added to approved list
- confirmed noxious/invasive plants
- State reference
- Iowa Weed Law, Iowa Code ch. 317
- Governing code
- Sioux City Municipal Code § 25.05.080
Summary
Sioux City bans noxious or invasive species from counting toward required landscaping, tying the ban to Iowa's noxious weed lists.
Plants may be added to the list if it is demonstrated by credible evidence that the species is not subject to: a. The Iowa State Noxious Weed List, U.S. Department of Agriculture; or b. The Iowa Noxious Weeds and the Iowa Weed Law, set out in Chapter 317, Code of Iowa, 1997... 3. Prohibited Plants. Plant species that are subject to those specifically called out in Item 2., above, are not allowed and may not be sought for addition to the approved plant list.
Full Breakdown
In new-development landscape plans, Sioux City, Iowa prohibits any plant species covered by the Iowa State Noxious Weed List or the Iowa Noxious Weeds and Iowa Weed Law (Iowa Code ch. 317). Such species cannot be used to meet the zoning code's landscaping requirements and cannot be petitioned onto the City's approved plant list, keeping invasive and noxious species out of mandated landscape plantings citywide.
Violations & Fines
A landscape plan proposing a listed noxious or invasive species toward required plantings is rejected at site plan review; it does not generate fines against existing private yards outside a development plan.
Frequently Asked Questions
Can I use an invasive species in a Sioux City landscape plan?
What list determines a prohibited plant in Sioux City?
Sources & Official References
Other rules in Sioux City
Compare Sioux City to another location·View the Iowa invasive plant rules overview
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