Planting Calendar for Seattle, WA

On average, your last spring frost occurs on March 17 (at SEATTLE URBAN SITE, WA climate station).
Crop Based on Frost Dates   Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds Outdoors
BeansN/AN/A Mar 24-Apr 14
Apr 5-14
BeetsN/AN/A Mar 2-24
Mar 2- 5, Mar 21-24
Bell Peppers Jan 5-19
Jan 5-19
Mar 31-Apr 21
Apr 5-19
N/A
Broccoli Feb 2-16
Feb 4-16
Feb 23-Mar 17
Mar 6- 9, Mar 11-17
N/A
Brussels Sprouts Feb 2-16
Feb 4-16
Feb 16-Mar 9
Feb 16-19, Mar 6- 9
N/A
Cabbage Jan 19-Feb 2
Jan 19-21
Feb 16-Mar 2
Feb 16-19
N/A
Cantaloupes Feb 16-23
Feb 16-19
Mar 31-Apr 21
Apr 5-19
N/A
CarrotsN/AN/A Feb 9-23
Feb 20-23
Cauliflower Feb 2-16
Feb 4-16
Feb 16-Mar 2
Feb 16-19
N/A
Celery Jan 5-19
Jan 5-19
Mar 24-Apr 7
Apr 5- 7
N/A
Collards Feb 2-16
Feb 4-16
Feb 16-Mar 9
Feb 16-19, Mar 6- 9
N/A
CornN/AN/A Mar 17-31
Mar 17-20
Cucumbers Feb 16-23
Feb 16-19
Mar 31-Apr 21
Apr 5-19
N/A
Eggplants Jan 5-19
Jan 5-19
Mar 31-Apr 21
Apr 5-19
N/A
Lettuce Feb 2-16
Feb 4-16
Mar 2-31
Mar 6-20
N/A
KohlrabiN/AN/A Feb 16-Mar 9
Feb 16-19, Mar 6- 9
Leeks Jan 5-19
Jan 5-19
Feb 16-Mar 9
Feb 16-19, Mar 6- 9
N/A
OkraN/AN/A Mar 31-Apr 14
Apr 5-14
OnionsN/AN/A Feb 16-Mar 9
Feb 20-Mar 5
ParsnipsN/AN/A Feb 23-Mar 17
Feb 23-Mar 5
PeasN/AN/A Feb 2-23
Feb 4-19
PotatoesN/AN/A Mar 9-31
Mar 21-31
Pumpkins Feb 16-Mar 2
Feb 16-19
Mar 31-Apr 21
Apr 5-19
N/A
RadishesN/AN/A Jan 19-Feb 9
Jan 22-Feb 3
SpinachN/AN/A Feb 2-23
Feb 4-19
Squash (Zucchini) Feb 16-Mar 2
Feb 16-19
Mar 31-Apr 21
Apr 5-19
N/A
Sweet Potatoes Feb 16-23
Feb 20-23
Mar 31-Apr 21
Mar 31-Apr 4, Apr 20-21
N/A
Swiss Chard Feb 2-16
Feb 4-16
Feb 23-Mar 2
N/A
Tomatoes Jan 19-Feb 2
Jan 19-21
Mar 24-Apr 14
Apr 5-14
N/A
TurnipsN/AN/A Feb 16-Mar 9
Feb 20-Mar 5
Watermelons Feb 16-23
Feb 16-19
Mar 31-Apr 21
Apr 5-19
N/A

Find the best dates for planting vegetables and fruit in your garden! Our free planting calendar calculates the best time to start seeds indoors and outdoors, as well as when to plant young plants outside.

How to Use the Planting Calendar

Simply put, a planting calendar is a guide that tells you the best time to start planting your garden. Most planting calendars are based on frost dates, which dictate when you should start seeds and when it's safe to plant outdoors in your area. Our planting calendar is customized to your location in order to give you the most accurate information possible.

On the planting calendar below, please note:

  • The Frost Dates indicate the best planting dates based on your local average frost dates. Average frost dates are based on historical weather data and are the planting guideline used by most gardeners.
  • The Moon Dates indicate the best planting dates based on your local frost dates and Moon phases. Planting by the Moon is considered a more traditional technique.
  • The Plant Seedlings or Transplants dates indicate the best time to plant young plants outdoors. This includes plants grown from seed at home and plants bought from a nursery. Although frost dates are a good way to know approximately when to start gardening, always check a local forecast before planting outdoors!
  • When no dates appear in the chart, that starting method is not recommended for that particular plant. Some crops do best when started outdoors rather than indoors, while others prefer the opposite.
  • Click on the name of a plant to see our corresponding Growing Guide.

To plan your garden more accurately in the future, keep a record of your garden's conditions each year, including frost dates and seed-starting dates!