When to Plant Tomatoes in Washington
Washington spans USDA hardiness 6a to 9b (zones 6a to 9b on this page). Plant tomatoes by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 6a · Zone 6b · Zone 7a · Zone 7b · Zone 8a · Zone 8b · Zone 9a · Zone 9b
Tomatoes planting calendar for Washington, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Start seeds indoors
Mar 14
Transplant outdoors
May 9
Projected first harvest
Jul 26
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Tomatoes planting calendar for Washington, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Start seeds indoors
Mar 9
Transplant outdoors
May 4
Projected first harvest
Jul 21
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Tomatoes planting calendar for Washington, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Start seeds indoors
Mar 4
Transplant outdoors
Apr 29
Projected first harvest
Jul 16
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 7 guide (both 7a and 7b) →
Tomatoes planting calendar for Washington, Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
Start seeds indoors
Feb 27
Transplant outdoors
Apr 24
Projected first harvest
Jul 11
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 7 guide (both 7a and 7b) →
Tomatoes planting calendar for Washington, Zone 8a
Average last spring frost
April 1
Average first fall frost
November 10
Start seeds indoors
Feb 18
Transplant outdoors
Apr 15
Projected first harvest
Jul 2
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 8 guide (both 8a and 8b) →
Tomatoes planting calendar for Washington, Zone 8b
Average last spring frost
March 20
Average first fall frost
November 20
Start seeds indoors
Feb 6
Transplant outdoors
Apr 3
Projected first harvest
Jun 20
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 8 guide (both 8a and 8b) →
Tomatoes planting calendar for Washington, Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Start seeds indoors
Jan 18
Transplant outdoors
Mar 15
Projected first harvest
Jun 1
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 9 guide (both 9a and 9b) →
Tomatoes planting calendar for Washington, Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Start seeds indoors
Jan 4
Transplant outdoors
Mar 1
Projected first harvest
May 18
Most tomatoes mature in about 55 to 85 days depending on the variety. Full zone 9 guide (both 9a and 9b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
30 varieties of tomatoes in the HomeSown library. Tap any for its full grow guide.
Common problems with tomatoes
What to watch for, with identification and treatment for each
🌱 Grow tomatoes with a calendar built for your exact yard
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