Invasive Plant Rules in DuPage County, IL (2026)

2 county-level rules, plus city-specific rules for 1 city in DuPage County, Illinois.

Verified from official government sources

Note: These county rules apply to unincorporated areas of DuPage County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Prohibited Species

DuPage County's landscape regulations bar developers from using certain weak-wooded or invasive species to satisfy required screening and parking-lot landscaping. Sec. 8-129.9 lists 26 prohibited trees, including buckthorn, Callery pear and Siberian elm, plus seven prohibited shrubs and herbaceous plants such as purple loosestrife and Japanese knotweed.

DuPage County Prohibited Invasive Plant List

Some Restrictions

DuPage County Code Sec. 8-129.9 (Prohibited Plants)

8-129.9: - PROHIBITED PLANTS. The following plants shall not be planted as a part of meeting the screening and parking lot landscaping requirements: 1.Trees:...Rhamnus frangula Buckthorn Weak wood, fruit, seed spread by birds, very invasive...Pyrus calleryana Callery pear, Bradford, Cleveland, Aristocrat, etc. Self-seeds, litter, weak wood and branch structure, short lived, very invasive...Ulmu...

Full ordinance details →Official source ↗

Tree-of-Heaven Removal

DuPage County's subdivision street-tree rule, Sec. 31-502.D, expressly bars Ailanthus altissima, Tree of Heaven, from the shade trees subdividers plant along new streets, alongside 13 other prohibited species.

DuPage County Bans Tree of Heaven in New Subdivisions

Some Restrictions

DuPage County Code Sec. 31-502.D

The planting of the following varieties of trees shall be prohibited: PROHIBITED PLANT SPECIES Botanic Name / Common Name: Acer negundo / Box elder; Ailanthus altissima / Tree of Heaven; Betual spp. / Birch; Juglans nigra and Hindsii / Black walnut; Catalpa speciosa / Catalpa; Elaeagnus spp. / Russian olive; Ginkgo biloba (female) / Female ginkgo; Maclura pomifera / Osage orange; Malus spp. / A...

Full ordinance details →Official source ↗

Invasive Plant Rules by City in DuPage County

1 cities in DuPage County have their own invasive plant rules rules. Each link goes to that city's dedicated page with code citations.

NapervillePop. 149,540

1 verified rule • Front Yard Gardens

All DuPage County ordinances

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