A young tree planted in a cool, damp stretch settles in with almost no fuss, while the same tree dropped into baked summer ground sulks and struggles to get going. In Washington, west of the Cascades, autumn and late winter give roots the easy start they need, and the right month depends on what kind of tree is going in.
When Is the Best Time to Plant Trees in Washington?
Shade and ornamental trees do best planted in October or November, with February through April as the other window, and the reasons follow the soil more than the calendar.
- In late winter, February is the first chance to plant once the ground thaws and is dry enough to work without compacting.
- In March and April, planting still works, as long as the tree goes in early enough for roots to start growing before summer heat arrives.
- Through summer, planting is the hardest, because heat and dry soil stress new roots that have not yet spread.
- In October and November, the soil is still holding warmth, so roots keep growing while the tree is above ground dormant.
- In winter west of the Cascades, rain keeps the roots of a fall-planted tree well watered without much help from you.
Container trees can go in most of the year if you water them, though they settle best in the dormant season, and balled-and-burlapped trees follow the same autumn and late-winter windows. Bare-root trees are planted while dormant, before the buds open. For reference, the last spring freeze in Seattle falls between February 27 and March 18, and the first fall freeze between November 13 and November 30. A mild frost date does not make early planting wise everywhere, because cold, wet soil slows roots in spring. Eastern Washington, beyond the Cascades, is high desert with a much shorter season, so local timing there differs. Zones across the state run from USDA 4a to 9a.
Washington — the year and the numbers
- State
- Washington
- USDA zones
- 4a-9a
- Last spring frost
- February 27 to March 18
- First fall frost
- November 13 to November 30
- Annual rain
- 39 in
- Lawn zone
- transition-season
- Source
- NOAA NCEI 1991-2020 Climate Normals, 32F freeze probabilities · Seattle
When to Plant Fruit Trees in Washington
Fruit trees go in during February or March when they are bare-root, and in October when they come in a pot. Bare-root trees must be planted while dormant, before the buds open, so late winter is the working window as soon as the soil can be dug.
Potted fruit trees can wait for fall. Let the weather cool first, and plant once the tree is losing or has lost its leaves.
| Kind of fruit tree | When to plant in Washington | Why then |
|---|---|---|
| Bare-root | February to March | The tree is dormant and the buds have not opened |
| Container | October | Cooler weather and leaf drop let the tree settle before winter |
A container fruit tree can also go in during early spring if you water it, though the dormant season gives it the calmest start. Pruning a newly planted fruit tree belongs to its own window later in the year, covered in the section on yearly tasks below.
Best Trees to Plant in Washington
Trees that handle dry summers and shade or sun to match your spot do best here. Red maple is a popular shade tree in Washington because it tolerates drought well, and several conifers offer different balances of shade and dryness tolerance.
Choose by how much room, sun and moisture your yard offers, and by your zone, since Washington covers a wide range of climates.
| Tree | How it does in Washington | Why |
|---|---|---|
| Red maple | Popular shade tree | Very drought tolerant |
| Douglas-fir | Good in partial shade | More shade tolerant than the pines, less drought tolerant than ponderosa pine |
| Grand fir | Suits shadier, moister spots | More shade tolerant than Douglas-fir or the pines, less drought tolerant |
| Lodgepole pine | Handles frosty sites | Most frost tolerant of the common tree species |
| Western larch | Needs more moisture than the pines | Less drought tolerant than the pines and Douglas-fir, less shade tolerant than the firs |
Sugar pine also fits shadier places, since it is more shade tolerant and less drought tolerant than lodgepole and ponderosa pines.
When to Plant, Water and Prune Trees in Washington
Planting, watering and pruning each have their own season. Planting follows the autumn and late-winter windows above, while pruning fruit trees waits for dormancy and the end of hard freezes.
| Task | Best timing in Washington | Why then |
|---|---|---|
| Plant shade and ornamental trees | October to November, or February to April | Roots establish before summer heat or in rain-fed fall soil |
| Plant fruit trees | February to March bare-root, October in pots | Dormant trees move with the least stress |
| Water a young tree | Regularly through the first dry summer, while the soil is not frozen | New roots dry out fast in summer heat |
| Prune fruit trees | February to March | Danger of hard freeze has passed and growth has not started |
Fruit trees are pruned before the buds swell, and pruning in fall or early winter is avoided, because new growth may not harden before cold. Apples are pruned first and peaches last, closest to bloom, since peach flower buds are easily hurt by cold. Sweet cherries can instead be pruned in August, when bacterial infection is less likely. Detailed pruning guidance lives on the page about when to prune fruit trees.
Where to Get Tree Advice in Washington
Washington State University Extension answers questions about choosing a tree, soil conditions and planting, and your county office can help with site-specific questions.
- The extension service publishes planting and landscape guidance for the state, useful before you buy a tree.
- Your county extension office can advise on a soil test and on which species suit your yard, so call before planting day.
Common Questions
Can You Plant a Tree in Summer in Washington?
You can, with steady watering, but summer is the hardest time because heat and dry soil stress new roots. A container tree handles it better than a bare-root one, which should wait for dormancy.
Should You Plant Fruit Trees in Fall or Spring in Washington?
Both work. Potted trees go in during October once the weather cools, and bare-root trees go in during February or March while still dormant.
Do Container Trees Need to Be Planted at a Certain Time?
Container trees can be planted most of the year if you keep them watered. They settle best when planted in the dormant season, in autumn or late winter.