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HomeMy WebLinkAboutTree List1 CITY OF RENTON Approved Tree List & & Spacing Guidelines November 2022 Edition As amended and approved by, Chip Vincent, Community & Economic Development Administrator Ian Gray, Urban Forestry & Natural Resources Manager 2 About this Approved List: The information in this list provides a selection of appropriate street tree species. The trees described are known to function in a street environment better than others. This list is subject to changes approved by the CED Director when new tree varietals are available or new invasive pests and disease are adversely impacting certain species in the list. The property owner can suggest alternative spacing, species or culti- vars not found in this guide for consideration by submitting a modification request, if so desired. Trees must be of specimen grade for street trees, have a minimum diameter at chest height above grade of 2 inches, balled & burlapped or in grow bags or containers and be approved for use by the Community & Economic Development Director, his designee or the Urban Forestry and Natural Resources Manager. The trees described on the following pages are arranged by mature height. Mature height and spread is pre- dicted with an average tree age of 30 years old. Many trees will grow beyond these heights as they age further, given sufficient watering, soil volume and soil quality. Selection and planting street trees requires planning-before-purchase principles: Site Location: size of area and characteristics Distances to obstructions in all directions—signs, houses, street lights, intersections, overhead utility lines, in-ground junction boxes, transformers, driveways, sidewalks, and streets Future mature size of the tree and how crown spread might impact obstructions and frequency of tree maintenance as it becomes larger Crown spread or height may need to be limited especially for narrow planting strips, tree grate plantings, and overhead utility lines (as low as 16’ feet over driveways, 18’-24’ feet over roads, 24’ + feet over railways) Competing vegetation’s impact on the tree—will the tree have sufficient soil, air-space, light and water for optimum growth and health Street trees should be the last item installed in new subdivisions prior to occupancy. If this is not feasi- ble, tree protection measures shall be followed to prevent soil compaction and trunk or branch dam- age. Species/cultivar: adaptability, mature size, crown spread, growth characteristics, suitability Small maturing trees: narrow planting strips 3 feet or wider, overhead utility lines, and grated tree pits Medium maturing trees: planting strips 6 feet and wider, no overhead utility lines Large maturing trees: planting strips 8 feet and wider, no overhead utility lines Many native trees may not be suitable due to mature size, evergreens obstruct views of pedestrians and vehicles, different habitat requirements and poor storm damage resilience when planted alone **CHECK CITY STANDARDS FOR TREE SPACING AWAY FROM SIGNS, UTILITIES, LIGHTS & CORNERS** City of Renton Approved Street Tree List 3 Utility or Signage Element Separation Distance Required Underground utilities 5’ feet Fire Hydrants 10’ feet Driveways 7.5’ feet Utility poles 10’ feet Stop and Yield signs 20’ feet Streetlights 25’ feet The Planting Process and Care: The use of any species must be pre-approved by the CED Director, his designee or the Urban Forestry Manager. A detailed site plan showing full build-out must include location of utilities in relation to the proposed street tree locations for review and approval. No plan is required for existing developments—a site visit will occur. Plans may be altered to include more or less trees, require alternative species, and reposition tree design to better fit the street tree configuration. Proposed street tree locations, shall be marked on the curb prior to approval. Approved street trees shall be watered and mulch applied by the property owner for the life of the tree following planting. The City of Renton shall provide tree maintenance pruning for the life of street trees or by permit is- sued to the property owner. See the standard construction detail diagrams for proper planting, root barrier, tree stakes and tree grate specifications. Use the chart below for determining appropriate spacing away from utilities and signs. Small maturing trees—use in 3-5 foot planting strips, tree grates and under overhead electric lines Medium maturing trees—use in 6-8 foot wide planting strips Large maturing trees—use in 8 feet or wider planting strips Tree Species Height & Spread City Sprite Zelkova 24 x 10 Japanese Tree Lilac 20 x 15 Summer Sprite Linden 20 x 15 Snowcone Silverbell 20 x 15 Native Flame Hornbeam 25 x 20 Toba Hawthorn 20 x 20 Wedding Bells Silverbell 20 x 15 Coral Sun Golden Raintree 20 x 20 ‘UTILITREES’ Put the Right Tree in the Right Place. These trees work well under power lines because they don’t get too tall! 4 Growth Rate:Slow to medium _______________________________________ Small-maturing Street Trees Cultivar:Summer Sprite Littleleaf Linden (Tilia cordata) Cultivar: Snowcloud Serviceberry (Amelanchier laevis) Mature size: 28 feet tall; 20 feet spread Fall Leaf: Orange and scarlet Growth Rate: Medium _______________________________________ Cultivar: Starlight Dogwood (Cornus kousa x nuttallii) Mature size: 30 feet tall; 20 feet spread Fall Leaf: Red Mature size: 20 feet tall; 15 feet spread Fall Leaf: Yellow Growth Rate: Slow _______________________________________ 5 Small-maturing Street Trees _______________________________________ Cultivar: Eastern Redbud (Cercis canadensis) Mature size: 25 feet tall; 30 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: 200 Block of Wells Ave. N. _______________________________________ Cultivar: "Vanessa' Persian Parrotia (Parrotia persica) Mature size: 28 feet tall; 14 foot spread Fall Leaf: Yellow Growth Rate: Medium Location: 300 Block of Wells Avenue S. ____________________________________ Cultivar: Snowcone Snowbell (Styrax japonicus) Mature size: 25 feet tall; 20 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: Tiffany Park Building ________________________________________ 6 Small-maturing Street Trees Cultivar: Japanese Tree Lilac Ivory Silk (Syringa reticulate) Mature size: 20 feet tall; 15 feet spread Fall Leaf: Yellow Growth Rate: Slow Location: S 4 St. west of Shattuck Avenue S _______________________________________ Cultivar: Native Flame American Hornbeam (Carpinus caroliniana) Mature size: 30 feet tall; 20 feet spread Fall Leaf: Red, yellow, and orange Growth Rate: Slow Location: East side of 3300 Block of E. Valley Rd. _______________________________________ Cultivar: Rosy Ridge Silverbell (Halesia Carolina) Mature size: 30 feet tall; 20 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: None ________________________________________ 7 Cultivar: Golden Raintree (Koelreuteria panicula- ta) Mature size: 30 feet tall; 30 feet spread Fall Leaf: Yellow Growth Rate: Slow Location: Coulon Park at Kidd Valley Restaurant _________________________________________ Small-maturing Street Trees Cultivar:Tschonoskii Crabapple (Malus sp.) Mature size:28 feet tall; 14 feet spread Fall Leaf:Red, Orange and Purple Growth Rate:Slow Location:Renton City Hall middle of front lawn __________________________________________ Cultivar: Red Rage Black Tupelo (Nyssa sylvatica) Mature size: 35 feet tall; 20 feet spread Fall Leaf: Red Growth Rate: Slow Location: 1400 Block of Harrington Ave. NE __________________________________________ Cultivar: Sourwood (Oxydendrum arboretum) Mature size: 20 feet tall; 15 feet spread Fall Leaf: Orange scarlet Growth Rate: Slow Location: Heritage Park along street __________________________________________ 8 Small-maturing Street Trees Species: Japanese Stewartia (Stewartia pseu- docamella) Mature size: 30 feet tall; 20 feet spread Fall Leaf: Orange, red and purple Growth Rate: Slow Location: Renton Community Center entrance ______________________________________ Species: City Sprite Zelkova (Zelkova serrata) Mature size: 24 feet tall; 18 feet spread Fall Leaf: Golden yellow Growth Rate: Medium Location: None ______________________________________ Species: Red Fox Katsuratree (Cercidiphyllum japonicum) Mature size: 30 feet tall; 16 feet spread Fall Leaf: Orange-bronze Growth Rate: Medium Location: None ______________________________________ Species: Toba Hawthorn (Crataegus x mordenensis) Mature size: 20 feet tall; 20 feet spread Fall Leaf: Orange, red and purple Growth Rate: Slow Location: Cedar River Trail near Wells Ave. _______________________________________ Species: 'Snowgoose' Cherry (Prunus spp.) Mature size: 15 feet tall; 15 feet spread Fall Leaf: Orange Growth Rate: Slow Location: None _______________________________________ Species: Amur Maackia Mature size: 30 feet tall; 30 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: Jefferson Ave N near 16th Species: European Hornbeam (Carpinus betulus 'Fastigiata) Mature size: 40 feet tall; 20 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: None __________________________________________ Small-maturing Street Trees Medium-maturing Street Trees 9 Medium-maturing Street Trees Species: Corinthian Linden (Tilia cordata) Mature size: 45 feet tall; 15 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: None _______________________________________ Species: Skyline Honeylocust (Gleditsia tria- canthos ‘inermis’) Mature size: 45 feet tall; 35 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: Renton Senior Center parking lot _______________________________________ Species: 'Emerald Sunshine' Elm (Ulmus propinqua) Mature size: 35 feet tall; 25 foot spread Fall Leaf: Yellow Growth Rate: Fast Location: Snoqualmie _________________________________________ Species: 'Skinny Genes' oak (Quercus x alba) Mature size: 45 feet tall; 10 foot spread Fall Leaf: Golden orange Growth Rate: Medium Location: Snoqualmie ______________________________________ 10 (Cercidiphyllum japonicum Species: Mountain Silverbell (Halesia monticola) Mature size: 40 feet tall; 25 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: At 226 Main Ave. S. ____________________________________ Species: Katsuratree Medium-maturing Street Trees Mature size: 40 feet tall; 40 feet spread Fall Leaf: Yellow and apricot orange Growth Rate: Medium Location: Burnett Lineal Park, north of _____________________________________ Species: Frontier elm (Ulmus ‘Frontier’) Mature size: 40 feet tall; 30 feet spread Fall Leaf: Burgundy Growth Rate: Fast Location: Main Ave. S parking lot islands _______________________________________ Species: Silver Linden (Tilia tomentosa) Mature size: 45 feet tall; 35 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: None _______________________________________ 11 Medium-maturing Street Trees Species: Crimean Linden (Tilia x euchlora) Mature size: 40 feet tall; 35 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: None _______________________________________ Species: American Hophornbeam (Ostrya vir- ginianna) Mature size: 40 feet tall; 25 feet spread Fall Leaf: Yellow Growth Rate: Slow _______________________________________ Species: Green Vase Zelkova (Zelkova serrata) Mature size: 45 feet tall; 15 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: S 3rd Street and Logan Avenue S _______________________________________ 12 Species: Glenleven Linden (Tilia cordata ) Mature size:40 feet tall; 25 feet spread Fall Leaf:Yellow Growth Rate:Slow Location:None ________________________________________ Species: Princeton Sentry Ginkgo (Ginkgo biloba ‘Princeton Sentry’) Mature size: 40 feet tall; 15 feet spread Fall Leaf: Yellow Growth Rate: Slow Location: None __________________________________________ Species: Prairie Sentinel Hackberry (Celtis occidentalis ‘Prairie Sentinel) Mature size: 45 feet tall; 12 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: None ___________________________________________ Medium-maturing Street Trees 13 Cultivar: ‘Chancellor’ Littleleaf Linden (Tilia cordata) Mature size: 35—70 feet tall; 25 feet spread Large-maturing Street Trees Fall Leaf: Golden yellow Growth Rate: Fast Location: Liberty Park skateboard parking lot islands _________________________________________________ Species: Accolade elm (Ulmus japonica x wilsoniana) Mature size: 60 feet tall; 50 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: None Cultivar: Green Mountain, Sterling _________________________________________________ Species: ‘Espresso’ Kentucky Coffeetree(Gymnocladus dioicus) Mature size: 70 feet tall; 60 feet spread Fall Leaf: Yellow Growth Rate: Slow Location: Tiffany Park near tennis courts. Only this cultivar allowed along streets. _______________________________________________ Species: Dawn Redwood (Metasequoia glyptostroboides) Mature size: 100 feet tall; 60 feet spread Fall Leaf: evergreen Growth Rate: Fast Location: Snoqualmie _______________________________________________ 14 Large-maturing Street Trees Species: Yarwood Planetree (Platanus x acerifolia) Mature size: 50 feet tall; 40 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: 2000 Block of Grant Ave. S. ___________________________________________ Species: Fruitless Horsechestnut (Aesculus hippocastanum ‘Baumannii’) Mature size:55 feet tall; 40 feet spread Fall Leaf:Yellow Growth Rate:Medium Location:None ___________________________________________ Species: Dura-Heat River Birch (Betula nigra) Mature size:50 feet tall; 35 feet spread Fall Leaf: Yellow Growth Rate: Medium Location: Teasdale Park parking lot ___________________________________________ Species: European beech (Fagus sylvatica) Mature size: 60-80 feet tall; 40 feet spread Fall Leaf: Yellow Growth Rate: Fast Location: None ____________________________________________ 15 Large-maturing Street Trees Cultivar: Autumn Gold Ginkgo—male only (Ginkgo biloba) Mature size: 45 feet tall; 35 feet spread Fall Leaf: Golden yellow Growth Rate: Slow Location: On south side of S. 2 Street west of Main ____________________________________________ Species: American Linden (Tilia americana) Mature size: 40 feet tall, 25 feet spread Fall Leaf: Yellow Growth rate: Fast Location: ‘Redmond’ American Lindens between N. 8 Street and N. 10 Street, both sides of street ____________________________________________ Species: Swamp White Oak (Quercus bicolor) Mature size: 50—70 feet tall; 40 feet spread Fall Leaf: Yellow, occasional purple or red Growth Rate: Slow Location: Jones Park ____________________________________________