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Urban Forestry
Arborist's Office
206-684-TREE (8733)
Street Tree Planting Procedures
New Tree Planting
Tree Planting Tips
Trees Approved with Reservations
Watering Newly Planted Trees
Watering Established Trees
Urban Forestry Permits
Tree Service Companies With An Annual Permit
Tree Pruning Guide
Landscape Architecture
Seasonal Tree Care
Utility/Tree Inspections
Heritage Tree Program
Seattle Tree Inventory
Landscape Architecture & Natural Systems
Urban Forestry Class and Resources
A City Among the Trees
Traffic Circles

Street Tree Planting Procedures

Small/Medium Trees: Appropriate Under Higher Power Lines
(management required to maintain clearance under lower power lines)
Good For Standard 5’ Planting Strips


Botanical name

Common Name

Height in feet

Spread in feet

Flowers

Fall Color

Comments/Notes

Acer campestre

Hedge Maple

30

30

 

yellow

 

Acer campestre

‘Evelyn’ Queen Elizabeth Maple

35

30

 

yellow

More upright branching than the species.

Acer truncatum x A. platanoides ‘Kiethsform’ Norwegian Sunset

35

25

yellow

yellow-orange/red

 

Acer truncatum x A. platanoides

Warren’s Red’ Pacific Sunset

30

25

yellow

yellow-orange/red

 

Arbutus ‘Marina’

25

15

pink

evergreen

Good substitute for Pacific Madrone. May exceed 25’ height under some site conditions.

Crataegus crus-galli ‘Inermis’

Thornless Cockspur Hawthorn

25

30

small white

Orange to scarlet

Red persistent fruit.

Crataegus x lavalii

Lavalle Hawthorne

28

20

small white

bronze

Thorns on younger trees.

Crataegus phaenopyrum

Washington Hawthorn

25

20

small white

scarlet

Thorny.

Koelreuteria paniculata

Goldenrain Tree

30

30

bright yellow

yellow

Midsummer blooming.

Magnolia grandiflora ‘Victoria’

25

20

White

evergreen

 

Malus ‘Tschonoskii’

28

14

White

scarlet

Sparse green fruit, pyramidal.

Prunus x hillieri ‘Spire’

30

10

pink

orange red

 

Pyrus calleryana ‘Capital’

Pear

35

12

White

reddish purple

Smaller than ‘Aristocrat’, may break up in snow.

Pyrus calleryana ‘Aristocrat’ Pear

40

45

White

red

 

Pyrus calleryana ‘Redspire’

Pear

35

25

White

yellow to red

Pyramidal.

Pyrus calleryana ‘Autumn Blaze’ Pear

30

25

White

scarlet

Vigorous.

Sorbus aucuparia ‘Mitchred’

Cardinal Royal Mt. Ash

35

20

white

rust

Bright red berries.

Sorbus x hybridia

Oakleaf Royal Mt. Ash

30

20

white

rust

 

Styrax japonica

Japanese Snowbell

25

25

white

yellow

Plentiful, green 1/2" seeds.

Tilia cordata ‘De Groot’

Linden

30

20

 

yellow

Compact, suckers less than other Lindens.

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