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FRAXINUS latifolia

Image of Fraxinus latifolia

James H. Schutte

Family

Oleaceae

Botanical Name

FRAXINUS latifolia

Plant Common Name

Oregon Ash

Special Notice

This entry has yet to be reviewed and approved by L2G editors.

General Description

Fast growing when young, the tall, narrow shape of the Oregon ash is not an especially ornamental shade tree. The American Northwest's only native ash species, its range is from Washington's Puget Sound southward to the Sierra Nevada and Great Valley of central California. It grows alongside woodland streams. The yellow fall foliage is one pretty attribute, as is the furrowed grayish brown bark that is ridged in white.

The compound leaves emerge light green and fuzzy in spring. They have seven to nice oval leaflets with crinkled veins and later smooth surfaces, the terminal leaflet is larger. In fall the foliage turns shades of yellow. The small flowers emerge before the leaves in spring and are dioecious, which means that trees are either fully male or female. The clusters of male flowers are yellowish while female flowers are green. Only the female trees produce winged fruits, called samaras. These are borne in clusters and are green when young and ripen to a tan.

Grow Oregon ash in full sun and well-drained soil that is evenly moist. While dormant in winter it can tolerate ground flooding and in natural periods of drought irrigation is not necessary. Oregon ash can be used as a shade tree, but its overall form doesn't make it especially ornamental. Male trees are preferred for urban areas because they do not produce the messy drop of fruits which will be eaten by birds and squirrels.

Characteristics

  • AHS Heat Zone

    8 - 6

  • USDA Hardiness Zone

    6 - 9

  • Sunset Zone

    3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Tree

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    40'-80' / 12.2m - 24.4m

  • Width

    30'-45' / 9.1m - 13.7m

  • Bloom Time

    Spring, Late Spring

  • Native To

    Northwestern United States, California

Growing Conditions

  • Soil pH

    Acidic, Neutral

  • Soil Drainage

    Average

  • Soil type

    Clay, Loam, Sand

  • Tolerances

    Wet Site, Drought

  • Growth Rate

    Medium

  • Water Requirements

    Drought Tolerant, Average Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Summer, Fall

Ornamental Features

  • Flower Interest

    Insignificant

  • Flower Color

    Yellow Green, Light Green

  • Fruit Color

    Green, Tan

  • Foliage Color (Spring)

    Green, Light Green, Yellow Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Yellow

  • Bark Color

    White, Brown, Gray

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    Yes

Special Characteristics

  • Bark Texture

    Fissured

  • Usage

    Shade Trees

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Birds

  • Self-Sowing

    Yes