# Oregon Ash (Fraxinus latifolia)

> Oregon ash, Fraxinus latifolia: a large tree of 40 to 80 feet where planted, for zones 6 to 9, how fast it grows, and the natives we grow for the same ground.

Blue Whale Trees, a native tree nursery in the United States. Web version: https://bluewhaletrees.com/species/oregon-ash/

![A tall Oregon ash in full golden fall color against a deep blue sky](https://bluewhaletrees.com/img/species/oregon-ash-1000.jpg?v=a6ac02f5 "An Oregon ash in fall color at Jackson Bottom Wetlands Preserve in Hillsboro, Oregon, on October 25, 2007. It may live 250 years.")
*Photo: born1945, [CC BY 2.0](https://creativecommons.org/licenses/by/2.0) ([source](https://commons.wikimedia.org/wiki/File%3AOregon_Ash%2C_Oregon_08.jpg))*

Large tree, 40 to 80 feet where planted, zones 6 to 9; full sun or part shade; average or wet ground.

We do not grow Oregon ash, and it is not in our shop. This page gathers what our tools say about it and the natives we grow for the same ground.

## At a glance

| Fact | Oregon Ash |
| --- | --- |
| Form | Large tree |
| Height, feet | 40 to 80 where planted; up to 90 in its native stands |
| Spread, feet | Up to 50 |
| Zones | 6 to 9 |
| Sun | Full sun or part shade |
| Soil moisture | Average or wet ground |
| Growth | Medium |
| Leaves | Deciduous |
| Traits | Fall color, wildlife value, street tree, erosion control |
| Flowers | March to May |
| Fruit | Samaras, August to October |
| First crop | About 30 years (20 to 30 in Calscape) |
| Pollination | Separate male and female trees. Oregon ashes are male or female trees, so a female bears seed only with a male nearby. |
| Lifespan | Can live 250 years. |
| Black walnut | Not named on the Morton Arboretum's lists |
| Ground | Floodplain forests, stream banks, swamps and wet flats, old fields and edges |
| Native in | 3 states |

Oregon ash is native in 3 states: [California](https://bluewhaletrees.com/tools/native/index.html.md?state=CA), [Oregon](https://bluewhaletrees.com/tools/native/index.html.md?state=OR) and [Washington](https://bluewhaletrees.com/tools/native/index.html.md?state=WA). The states are the USDA PLANTS Database's records, with the native range read from Silvics of North America and the NRCS plant guide.

## What our tools say

- [How fast it grows and how big it gets, by site](https://bluewhaletrees.com/tools/growth/index.html.md?species=oregon-ash): the growth estimator
- [Whether it suits your zone, sun and soil](https://bluewhaletrees.com/tools/site-check/index.html.md?species=oregon-ash): the planting-site check
- [How far from a house, wires and a septic field](https://bluewhaletrees.com/tools/distance/index.html.md?species=oregon-ash&near=house,septic,pavement,wires,boundary,tree): the planting-distance tool
- [What grows with it in the wild and in a yard](https://bluewhaletrees.com/tools/companions/index.html.md?species=oregon-ash): the companion species tool
- [When to plant it where you live](https://bluewhaletrees.com/tools/planting-window/index.html.md?species=oregon-ash): the planting-window tool
- [When it flowers and fruits, month by month](https://bluewhaletrees.com/tools/calendar/index.html.md?plants=oregon-ash): the bloom and fruit calendar
- [How to sow its seed, with dates for your place](https://bluewhaletrees.com/tools/sowing/index.html.md?species=oregon-ash): the seed sowing planner
- [How many to plant for a crop of seed](https://bluewhaletrees.com/tools/pollination/index.html.md?plants=oregon-ash:5): the pollination planner
- [Whether one you have can be moved, and what the move takes](https://bluewhaletrees.com/tools/transplant/index.html.md?species=oregon-ash): the transplant planner
- [How old one is, from its trunk](https://bluewhaletrees.com/tools/tree-age/index.html.md?species=oregon-ash): the tree age calculator
- [How a big one scores against the champion trees](https://bluewhaletrees.com/tools/big-tree/index.html.md?species=oregon-ash): the big-tree measurer

## For the same ground, we grow

- [Peachleaf Willow](https://bluewhaletrees.com/plants/peachleaf-willow/index.html.md) (*Salix amygdaloides*): medium tree, 35 to 60 feet, zones 2 to 8. Shares floodplain forests, stream banks, swamps and wet flats in the wild.
- [American Plum](https://bluewhaletrees.com/plants/american-plum/index.html.md) (*Prunus americana*): small tree, 15 to 25 feet, zones 3 to 8. Shares stream banks, old fields and edges in the wild.
- [Chokecherry](https://bluewhaletrees.com/plants/chokecherry/index.html.md) (*Prunus virginiana*): small tree, 20 to 30 feet, zones 2 to 10. Shares stream banks, old fields and edges in the wild.
- [Black Cherry](https://bluewhaletrees.com/plants/black-cherry/index.html.md) (*Prunus serotina*): large tree, 50 to 80 feet, zones 2 to 9. Shares old fields and edges in the wild.
- [Every companion of Oregon ash in the companion species tool](https://bluewhaletrees.com/tools/companions/index.html.md?species=oregon-ash)

## Read from

Its figures come from Silvics of North America, the Woody Plant Seed Manual, the USDA PLANTS Database, Oregon State University's Landscape Plants, Cal Poly's SelecTree, the Wildflower Center, Calscape, the Jepson eFlora, NC State Extension and Oregon State University's Oregon Wood Innovation Center.