Tree Selection

Right tree, right place
When selecting a tree species, think about how large the tree will grow over its lifetime and if your yard has the right sunlight, space and soil conditions to thrive. In particular, consider:

• Available space for tree branches and roots to grow. Trees should be planted 10 feet away from water, sewer and gas lines.
• Tree size at maturity. The larger your tree is, the greater the benefits it can provide. However, before you plant a large tree you should be sure you have enough space for it. Trees planted under power lines should be less than 25’ tall at maturity.
• Utilities. In addition to powerlines, trees should be planted at least 5 ft. from underground utility lines, 10 ft. from power poles, 20 ft. from street lights or other trees, and 30 ft. from a corner curb.
• Evergreen or deciduous. Evergreen trees, which hold their leaves year-round, trap far more stormwater runoff than do deciduous trees, helping keep our waterways clean.
• Summer growing conditions. Does your site need a tree that can handle drought or flooding?
• Street tree permits. If your new tree will be in the planting strip or right of way, you need a permit from SDOT. You can obtain a permit by calling (206) 684-TREE or clicking here.

TREE SELECTION RESOURCES

Demystifying the Art of Tree Selection

Small trees list

Small/medium trees list

Medium/large trees list

Large trees list

King County Native Plant Guide

Conifer database