Tree List - Idaho Power

Trees selected for the Fall 2019 Shade Tree Project have been approved and selected by local arborists. They are taller in size, provide good shade and have been adapted for our climate.

Below are the common characteristics of the trees being offered, including mature size, shape and other defining characteristics. Sizes are typical for the species; actual size at maturity may vary. These trees are chosen to grow tall and provide shade. Do not plant near overhead lines.

Please note: Not all trees available in all areas.

Common Hackberry – Celtis occidentalis

This fast-growing hackberry can reach heights of 60 feet with a spread of 40-60 at maturity. It has beautiful rough corky bark and small fruit that turn from reddish orange to a deep purple and are loved by birds. Its green leaves give way to a nice yellow color in the fall. It has a vase shape in youth maturing to an irregularly rounded crown. The hackberry has a high tolerance to drought once established.

45-60′ High
40-60′ Spread
Vase Shape

Bur Oak

This large oak has massive leaves which can reach lengths of 12 inches long and 8 inches wide. It has a round shape and can reach heights of 50 to 80 feet with a 45 to 80 foot spread at maturity; make sure this tree is planted in an area that can support its size. Its bark and branches are chunky and textured in appearance. The brown inconspicuous flowers are not showy giving way to quite large and attractive acorns. The Bur Oak has a high drought tolerance once established and can handle many soil conditions. Its leaves turn yellow in the fall.

50-80′ High
45-80′ Spread
Oval Shape

Swamp White Oak

Swamp White Oaks can grow to 50 feet or more with a 50-70-foot canopy spread. They are round in shape. They feature lustrous, heavy textured green leaves with wavy margins that turn yellow-brown to reddish purple in the fall. Oaks may not do well in highly alkaline soil.

50-70′ High
50-70′ Spread
Round Shape

Greenspire Linden

This tree has a very symmetrical, pyramid shape. It has fragrant yellow flowers in early summer and yellow fall foliage. It may reach heights of 60 feet, with a 40-foot spread.

50-60′ High
30-40′ Spread
Pyramid Shape

London Planetree

This tree has naturally shedding bark, creating a dappled brown and cream pattern that accentuates sunlight filtering through the maple like medium to dark green foliage.

75’-85’ High
60’-70’ Spread
Pyramid Shape

Frontier Elm

This tree has glossy green foliage which turns to a long lasting beautiful reddish-purple to burgundy color in the fall. They are disease-tolerant for Dutch Elm and a hardy, fast growing tree.

30’-40’ High
20’-30’ Wide
Oval Shape

Valley Forge Elm

These classic vase shaped elms have a full sense canopy and yellow autumn leaves. They are disease-tolerant for Dutch Elm and adapt to a wide variety of soil conditions.

60’-80’ High
25’-35’ Wide
Oval Shape

New Harmony Elm

This tree has medium green leaves turning yellow in the fall with an upright vase shape. It is disease-tolerant for Dutch Elm and a hardy, fast growing tree.

60’-70’ High
50’-60’ Wide
Vase Shape

English Oak

This tree features lustrous, heavy textured green leaves that turn copper colored in the fall. It prefers moist, well-drained, moderately rich soils of variable pH, but adapts very well to moderately dry soils of poor quality. It thrives in full sun to partial sun.

50’-60’ High
40’-60’ Wide
Oval Shape