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The Tree Commission was established for the city, which consists of five residents of the city, appointed by the Mayor with the approval of the Council, for staggered terms of three years. Members of the Commission serve without compensation. In the event a vacancy occurs during the term of any member, a successor shall be appointed for the unexpired portion of the term. The Tree Commission shall provide leadership in the development and understanding of the objectives of the tree program and assist in the development and maintenance of technical specifications and guidelines. The Tree Commission shall produce and maintain a list of kinds and species of trees suitable and desirable for planting and the areas and conditions under which such trees should be planted. This list, to be known as the “Master Tree List” shall be adopted by resolution of the Council. The Tree Commission shall also review subdivisions plats and plans for new developments and recommend tree preservation and tree plantings therein. The Council may require the implementation of any recommendation by the Tree Commission.

Master Tree List

City of Clinton, Iowa

The following is a list of trees that are permitted to be planted in the City of Clinton parkways*.  It also includes trees not to be planted because of their lack of resistance to common tree diseases and/or pests or susceptibility to wind/storm damage.  This list may also be used by builders, homeowners, and business owners as a guide to appropriate trees to plant on their property in the Clinton, Iowa area.  All trees being considered must meet the American Standards for Nursery Stock.  A permit is required (there is no charge; obtain from City Hall) for any trees planted in parkways.  Most trees listed can be viewed at The Bickelhaupt Arboretum, 340 S. 14th St., Clinton, and are shown on their map of plantings and marked as a City of Clinton tree.

* Parkway:  City-owned property usually between the curb and the sidewalk (151.02, # 2 CHAPTER 151, City of Clinton)

For narrow parkways, 5 - 6’ wide:            For medium parkways, 6 - 8’ wide;         For wider parkways, 9’ or more;                                                              can use trees from narrow group:              can use trees from narrow & me-                                                                                                                                                           dium parkways group:

Acer - Maple                                                  Carpinus - Hornbeam                          Tilia - Linden
Black Maple, 55’ tall by 25’ wide              European Hornbeam, 35’ tall                Littleleaf Linden, 50’ tall by 35’ wide
orway Maple, 45’ tall by 20’ wide         by 20' wide                                                Greenspire Linden, 50’ tall by 35’ wide
eman Maple, 60’ tall by 20' wide                                                                            Pyramidal American Linden, 50' tall      
Red Maple 55' tall by 20' wide                    Crataegus - Hawthorn                          by 35' wide
Sugar Maple, 55’ tall by 20’ wide              Washington Hawthorn, 25’ tall 
                                                                         by 15' wide       
                                                                        Thornless Hawthorn, 25’ tall 
                                                                         by 15' wide
                                                                                                                                                   Ulmus - Elm
Ginkgo - Ginkgo                                   Malus – Crabapple                                                Commendation Elm, 60’ tall by 50’   
Ginkgo, 60’ tall by 25’ wide                 Any species of flowering crabapple                 Triumph Elm 55' tall by 50' wide                 
                                                         trees shall conform to the following re-          Accolade Elm, 70' tall by 45' wide
Quercus - Oak                                       quirements: only persistent fruited or               Discovery Elm, 45' tall by 40' wide
English Oak, 55' tall by 45' wide          sterile cultivars of an upright ,oval, or               Other new disease resistant cultivars
White Oak, 55' tall by 45' wide            vase shape combined with good leaf               are acceptable also.
Red Oak, 55' tall by 45' wide                tolerance shall be acceptable.  Spreading
 Bur Oak, 55' tall by 45' wide                types and disease prone cultivars are
                                                                   not acceptable.         

 Gledistsia - Locust                                                                                                               Syringa - Reticulata
Only thornless varieties:                                     Pyrus - Flowering Pear                        Japanese Tree Lilac, 20’ tall by 15’ wide
Shade Master Locust, 60’ tall by 50’ wide      Callery Pear, 35’ tall by 20’ wide         Ivory Silk Tree Lilac, 25’ tall by 20’ wide
Skyline Locust, 65’ tall by 45’ wide                   Also, only  thornless cultivars 
                                                                                 selected for 90 degree branching
                                                                                 habit are acceptable.  Cultivars
                                                                                 such as Bradford have narrow "V"
                                                                                 branching habits that develop weak 
                                                                                 bonds making them vulnerable to 
                                                                                 storm damage so are not acceptable.                                 


The following tree species cannot be included in parkway tree planting in the City of Clinton:

            All Ash varieties – due to the spread of emerald ash borer (EAB)

            Boxelder                                                        Cottonwood                                                 White Poplar

            Lombardy Poplar                                          Tree of Heaven                                           Willows

            Black Locust                                                 Silver Maple                                                Catalpa

            Bolleana Poplar                                             Russian Olive                                              Weeping Birch

            Mulberry                                                        Sycamore                                                   Siberian Elm


No evergreens or shrubs may be planted between the sidewalk and the curb of any street due to visual safety.

All trees must be pruned to prevent encroachment onto sidewalks or paving.

Trees that reach a mature height in excess of 25’ cannot be planted under utility wires.