Regional guide

Washington West of the Cascades Vegetable Garden

WSU Extension guide for western Washington gardens where cool springs, rainfall, and mild winter microclimates shape vegetable planning.

Regional timing

Current regional planting plan

WSU Extension guide for western Washington gardens where cool springs, rainfall, and mild winter microclimates shape vegetable planning.

Source-backed timing WSU Extension Home Vegetable Gardening in Washington

Western Washington 5 climate signals

Source source cues Local conditions

WSU says climate planning should consider growing-season length, first and last frost dates, and in-season temperatures.
Warm-season crops often need a longer or warmer season than is available west of the Cascade Mountains.
Where temperature limits warm-season crops, row covers and plastic tunnels can help.

Catalog priority: 23 priority crops
Climate checks: 5 climate signals
Timing basis: Use regional source signals

Source-backed timing WSU says climate planning should consider growing-season length, first and last frost dates, and in-season temperatures.

Warm-season crops often need a longer or warmer season than is available west of the Cascade Mountains.

Crop priority Black Seeded Simpson Lettuce leads the catalog examples

Black Seeded Simpson Lettuce, Bloomsdale Spinach, Lacinato Kale, Astro Arugula

Next local check Most vegetables need at least six hours of direct sun and fertile, well-drained soil; drainage is especially important where rainfall is heavy.

Transplants can produce earlier harvests; root crops such as carrots, beets, and radishes are exceptions that do not transplant readily.

Calendar Convert regional timing into dated sowing, transplant, and harvest jobs. Frost dates Keep hardiness zone context separate from local first and last frost dates. All regions Compare this guide with the broader regional atlas. Walla Walla Inland NW WSU Walla Walla County guide for Inland Northwest frost-free timing, microclimates, soils, sun, temperature, and watering.

Climate signals

WSU says climate planning should consider growing-season length, first and last frost dates, and in-season temperatures.
Warm-season crops often need a longer or warmer season than is available west of the Cascade Mountains.
Where temperature limits warm-season crops, row covers and plastic tunnels can help.
Many cool-season crops can grow through winter west of the Cascades, depending on microclimate.
Cool springs in western Washington can make germination difficult for crops that prefer warm soils.

Planning notes

Most vegetables need at least six hours of direct sun and fertile, well-drained soil; drainage is especially important where rainfall is heavy.
Transplants can produce earlier harvests; root crops such as carrots, beets, and radishes are exceptions that do not transplant readily.
Harden vegetable transplants for 4-7 days before garden planting.
Warm-season transplants such as tomato, pepper, and eggplant prefer 70-75F day and 55-60F night temperatures while developing.
Cool-season transplants such as broccoli, lettuce, and cabbage do well with 65-75F day and 50-55F night temperatures.
Succession planting is source-backed for crops maturing in 40-60 days and harvested once, including turnips, beets, radishes, lettuce, and kohlrabi.
Leaf crops can also support staged harvests, including lettuce, arugula, kale, mustard, beets, bok choy, turnip, and collards.
Rotate crops by family where possible; WSU recommends 5-7 years before planting the same family in the same bed or row.
Use these priority catalog links as crop-level examples for WSU crop groups, not WSU cultivar recommendations.

Catalog crop examples

These catalog entries match crops covered by the regional timing source; variety-specific details remain tied to each seed entry's own source.

Black Seeded Simpson Lettuce Vegetable · Cool · 45 days
Bloomsdale Spinach Vegetable · Cool · 42 days
Lacinato Kale Vegetable · Cool · 60 days
Astro Arugula Vegetable · Cool · 35 days
Southern Giant Curled Mustard Vegetable · Cool · 45 days
Georgia Southern Collards Vegetable · Cool · 65 days
White Stem Bok Choy Vegetable · Cool · 45 days
Waltham 29 Broccoli Vegetable · Cool · 74 days
Golden Acre Cabbage Vegetable · Cool · 64 days
Snowball Y Cauliflower Vegetable · Cool · 70 days
Long Island Improved Brussels Sprouts Vegetable · Cool · 100 days
Early White Vienna Kohlrabi Vegetable · Cool · 55 days
Detroit Dark Red Beet Vegetable · Cool · 58 days
Danvers 126 Carrot Vegetable · Shoulder · 70 days
French Breakfast Radish Vegetable · Cool · 28 days
Purple Top White Globe Turnip Vegetable · Cool · 55 days
American Purple Top Rutabaga Vegetable · Cool · 90 days
Sugar Snap Pea Vegetable · Cool · 62 days
Evergreen Bunching Onion Vegetable · Shoulder · 65 days
American Flag Leek Vegetable · Cool · 120 days
Italian Flat Leaf Parsley Herb · Shoulder · 75 days
Hollow Crown Parsnip Vegetable · Cool · 120 days
Common Chives Herb · Cool · 80 days

Related regional guides

Walla Walla Inland Northwest Vegetable Garden WSU Walla Walla County guide for Inland Northwest frost-free timing, microclimates, soils, sun, temperature, and watering.

Source: WSU Extension Home Vegetable Gardening in Washington