When to Plant Corn in Washington
In a typical Washington location, sow outdoors Mar 24 – Apr 7. Across the state, the outdoor planting window starts as early as Mar 1 in Port Townsend and as late as May 30 in Cheney.
Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks.
Corn Planting Dates by City
| City | Direct sow |
|---|---|
| Seattle | Mar 13 – Mar 27 |
| Tri-Cities | Apr 27 – May 11 |
| Spokane | Apr 26 – May 10 |
| Tacoma | Mar 8 – Mar 22 |
| Vancouver | Mar 29 – Apr 12 |
| Bellevue | Mar 8 – Mar 22 |
| Kent | Mar 20 – Apr 3 |
| Everett | Mar 24 – Apr 7 |
| Renton | Mar 13 – Mar 27 |
| Federal Way | Mar 8 – Mar 22 |
| Spokane Valley | Apr 26 – May 10 |
| Yakima | May 8 – May 22 |
| Kirkland | Mar 8 – Mar 22 |
| Bellingham | Apr 1 – Apr 15 |
| Kennewick | Mar 28 – Apr 11 |
| Auburn | Mar 20 – Apr 3 |
| Pasco | Mar 28 – Apr 11 |
| Marysville | Mar 24 – Apr 7 |
| Redmond | Mar 8 – Mar 22 |
| Lakewood | Mar 11 – Mar 25 |
| Olympia | Apr 29 – May 13 |
| Shoreline | Mar 8 – Mar 22 |
| Richland | Apr 6 – Apr 20 |
| South Hill | Apr 11 – Apr 25 |
| Sammamish | Mar 8 – Mar 22 |
| Burien | Mar 2 – Mar 16 |
| Lacey | Apr 29 – May 13 |
| City of Sammamish | Mar 30 – Apr 13 |
| Bothell | Mar 8 – Mar 22 |
| Edmonds | Mar 9 – Mar 23 |
Showing the 30 most populous of 133 Washington cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Washington cities.
Frequently Asked Questions
When should I plant corn in Washington?
In a typical Washington location, sow outdoors Mar 24 – Apr 7. Across the state, the outdoor planting window starts as early as Mar 1 in Port Townsend and as late as May 30 in Cheney.
When is the last frost in Washington?
The average last spring frost in Washington ranges from March 1 in Port Townsend to May 30 in Cheney, based on NOAA 1991–2020 climate normals.
How long do corn take to grow?
Corn typically take 60–100 days from planting to harvest. Direct sow at last frost to 2 weeks after, once soil reaches 60F; does not transplant well. Succession sow every 2 weeks.
Other Crops in Washington
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Winter Squash
- Pumpkins
- Watermelon
- Cantaloupe
- Green Beans
- Peas
- Lettuce
- Spinach
- Kale
- Arugula
- Swiss Chard
- Broccoli
- Cauliflower
- Cabbage
- Brussels Sprouts
- Carrots
- Beets
- Radishes
- Turnips
- Onions
- Garlic
- Potatoes
- Sweet Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
- Dahlias
When to plant corn in other states