Pacific Northwest USDA Zones. Even in each state, growing zones are varied. Washington is designated as UDSA zones 4a–9a – while Seattle may be 9a, Spokane is 6b.

In the Pacific Northwest, USDA hardiness zones span 6 to 9, but there are some areas where it is zone 4. This means it is difficult to pinpoint exact timings for the whole region in spring.

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The USDA divides the United States into seven planting regions, known as hardiness zones, which were most recently updated in 2023. The maps below show these planting regions.

Tetrapanax suckers, so plant it in a pot or contained area unless you want a little grove, which can be spectacular if you've got the room. Deciduous most winters, but root hardy to Zone 6. 8.

Note: Amy Campion will give a talk at Hortlandia on Sunday at 11:30 a.m. about pint-size plants for Pacific Northwest gardens. She will also have a booth at the plant sale to sell and sign and ...

Now's the time to be planting and replanting your Pacific Northwest garden. Ann Lovejoy. ... The planting and transplanting sweet spot is the period between mid-October and mid-December, ...

If your tomatoes get full sun (10-14 hours a day), that’s ideal. If not, they may do better in large pots than in the ground. Give each plant a pot that holds 2-3 cubic feet of potting soil.