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Planting Calendar for Seattle, WA

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The planting calendar below tells you when to plant in the SPRING and also plant in the FALL, based on your zip code or postal code.

Spring Planting Calendar

Our spring planting calendar starts with the very first dates that you can plant (based on the last spring frost). But if you've missed these dates, no worries! This is why we've added "last planting dates" to our spring calendar; this is meant to help new gardeners understand that if they missed the first spring planting window, they could still get crops in the ground.

In fact, many crops with short maturity times (such as radishes) can be succession planted all the way through the summer in northern areas. However, note that some cool-season crops, such as kale and lettuce, do not grow well in hot temperatures, which can cause bolting issues.  For some gardeners, especially in the South, a break to avoid summer heat is needed, but they can start once the heat has passed. 

The dates provided are based on the number of weeks before or after frost, so we can provide a unique calendar to every user in the country. Thus, several crops (especially similar crops) may appear to have the same date. Kale and lettuce, for example, or dates for starting seeds, like broccoli and cabbage. 

Fall Planting Calendar

When we say "fall," we really mean planting in summer in time for a fall harvest. Think of this as a second summer! It's easy to keep the crops going if you've already prepared the soil! 

Many crops that would be started indoors for a spring crop can just be plunked into the soil directly for a fall crop. Not only is the soil already warm but also there are less pests and it tends to be rainier so you don't need to water as often. Some fall vegetables need to be harvested by the first frost, but many are frost-tolerant and even taste better after a kiss of fall frost!

See each plant's individual Growing Guide for more specific planting, plant care, and harvesting information.

Specifically, on the charts, there are different columns labeled as follows:

  1. Start Seeds Indoors: When to sow seeds indoors to get an early start on the season.
  2. Plant Seedlings Outdoors: When to put small seedlings that you grew indoors (OR starter plants that you bought at a garden nursery) in the outdoor soil.
  3. Start Seeds Outdoors: When to plant seeds directly into the outdoor soil.
  4. Last Date to Plant: You may plant any time from the "start seeds" dates until this "last date." Don't wait any longer, or the crop won't have time to get to harvest before fall/winter frosts.

The "Moon Dates" indicate the best planting dates based on Moon phases. You can learn more about this age-old technique below.

When N/A appears in the chart, that starting method is typically not recommended, although it is likely still possible. 

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Planting Dates for Spring

On average, your last spring frost occurs on March 21 (at SEATTLE BOEING FLD, WA climate station, elevation 19 feet).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds OutdoorsLast Date to Plant
ArugulaFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Feb 28-Mar 14
Frost Feb 21-28
Moon Feb 21-24
Oct 13
AsparagusN/AN/AFrost Mar 6-21
Moon Mar 6-21
Mar 21
BasilFrost Feb 7-21
Moon Feb 9-21
Frost Apr 4-18
Moon Apr 8-18
Frost Apr 4-18
Moon Apr 8-18
Sep 29
BeetsN/AFrost Mar 6-21
Moon Mar 6-21
Frost Feb 21-28
Moon Feb 25-28
Apr 4
Bell PeppersFrost Jan 10-24
Moon Jan 11-24
Frost Apr 4-11
Moon Apr 8-11
N/AAug 18
Bok ChoyFrost Feb 7-21
Moon Feb 9-21
Frost Apr 4-11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
May 2
BroccoliFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Mar 6-21
Frost Feb 21-28
Moon Feb 21-24
Sep 8
Brussels SproutsFrost Feb 7-21
Moon Feb 9-21
Frost Mar 6-21
Frost Feb 21-28
Moon Feb 21-24
Aug 4
CabbageFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Mar 6-21
Frost Feb 21-28
Moon Feb 21-24
Jul 28
CantaloupesFrost Feb 28-Mar 14
Frost Mar 21-Apr 4
Moon Mar 21-25
Frost Mar 28-Apr 4
Aug 4
CarrotsN/AN/AFrost Feb 21-Mar 6
Moon Feb 25-Mar 6
Sep 1
CauliflowerFrost Feb 7-21
Moon Feb 9-21
Frost Mar 14-28
Moon Mar 14-25
N/ASep 1
CeleryFrost Dec 27-Jan 10
Frost Mar 28-Apr 11
Moon Apr 8-11
Frost Mar 21
Moon Mar 21
Sep 1
ChivesFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Feb 28-Mar 6
Frost Feb 28-Mar 6
Sep 15
Cilantro (Coriander)N/AN/AFrost Mar 21-Apr 4
Moon Mar 21-25
Apr 11
CollardsFrost Feb 7-21
Moon Feb 9-21
Frost Mar 6-21
Frost Feb 28-Mar 6
Sep 1
CucumbersFrost Feb 28-Mar 6
Frost Mar 28-Apr 11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
Sep 1
DillN/AN/AFrost Mar 14-Apr 4
Moon Mar 14-25
Sep 15
Dry BeansN/AN/AFrost Apr 4-11
Moon Apr 8-11
Aug 4
EggplantsFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Apr 4-11
Moon Apr 8-11
N/ASep 1
Fava BeansN/AN/AFrost Feb 21-28
Moon Feb 21-24
Apr 4
FennelFrost Feb 7-21
Moon Feb 9-21
Frost Mar 28-Apr 4
Frost Mar 21-Apr 4
Moon Mar 21-25
Aug 25
GarlicN/AN/AN/A
Green BeansN/AN/AFrost Mar 28-Apr 18
Moon Apr 8-18
Sep 1
Honeydew MelonsFrost Feb 28-Mar 6
Frost Apr 4-11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
Aug 11
Jalapeño PeppersFrost Jan 10-24
Moon Jan 11-24
Frost Apr 4-11
Moon Apr 8-11
N/A
KaleFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Mar 6-21
Frost Feb 21-28
Moon Feb 21-24
Apr 4
KohlrabiFrost Feb 7-21
Moon Feb 9-21
Frost Feb 28-Mar 6
Frost Feb 21-28
Moon Feb 21-24
Apr 4
LeeksFrost Jan 10-24
Moon Jan 11-24
Frost Feb 28-Mar 14
N/AJul 28
LettuceFrost Feb 7-21
Moon Feb 9-21
Frost Feb 28-Mar 6
Frost Feb 21-28
Moon Feb 21-24
Apr 4
Mustard GreensN/AN/AN/A
OkraFrost Feb 21-Mar 6
Moon Feb 21-24
Frost Apr 4-11
Moon Apr 8-11
Frost Apr 4-18
Moon Apr 8-18
Sep 1
OnionsN/AFrost Feb 21-Mar 6
Moon Feb 25-Mar 6
N/AAug 4
OreganoFrost Jan 10-Feb 7
Moon Jan 11-25
Frost Mar 28-Apr 11
Moon Apr 8-11
N/ASep 1
ParsleyFrost Jan 10-24
Moon Jan 11-24
Frost Mar 28-Apr 11
Moon Apr 8-11
Frost Feb 21-Mar 28
Moon Feb 21-24
Aug 25
ParsnipsN/AN/AFrost Feb 21-28
Moon Feb 25-28
Aug 4
PeanutsN/AN/AFrost Apr 11-25
Moon Apr 24-25
PeasN/AN/AFrost Feb 21-28
Moon Feb 21-24
Apr 4
PotatoesN/AN/AFrost Feb 21-Mar 6
Moon Feb 25-Mar 6
Sep 1
PumpkinsFrost Feb 28-Mar 14
Frost Apr 4-11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
Jul 28
RadishesN/AN/AFrost Feb 21-28
Moon Feb 25-28
Sep 15
RosemaryFrost Dec 27-Jan 10
Frost Apr 4-11
Moon Apr 8-11
N/ASep 15
SageFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Mar 28-Apr 11
Moon Apr 8-11
N/AAug 25
SalsifyN/AN/AFrost Feb 21-Mar 6
Moon Feb 25-Mar 6
Aug 4
SpinachFrost Feb 7-21
Moon Feb 9-21
Frost Feb 28-Mar 6
Frost Feb 21-28
Moon Feb 21-24
Apr 4
Sweet CornN/AN/AFrost Apr 4-18
Moon Apr 8-18
Aug 25
Sweet PotatoesN/AN/AFrost Apr 4-18
Moon Apr 4-7
Jul 28
Swiss ChardFrost Feb 7-21
Moon Feb 9-21
Frost Mar 6-21
Frost Feb 28-Mar 21
Moon Mar 15-21
Apr 4
ThymeFrost Jan 10-24
Moon Jan 11-24
Frost Mar 28-Apr 4
N/AAug 18
TomatillosFrost Feb 7-21
Moon Feb 9-21
Frost Apr 4-18
Moon Apr 8-18
N/AAug 25
TomatoesFrost Jan 24-Feb 7
Moon Jan 24-25
Frost Apr 4-11
Moon Apr 8-11
N/AAug 11
TurnipsN/AN/AFrost Feb 21-28
Moon Feb 25-28
Oct 13
WatermelonsFrost Feb 28-Mar 14
Frost Apr 4-11
Moon Apr 8-11
Frost Mar 28-Apr 4
Aug 11
Winter SquashFrost Feb 28-Mar 6
Frost Mar 28-Apr 11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
Jul 21
Zucchini (Summer Squash)Frost Feb 28-Mar 6
Frost Mar 28-Apr 11
Moon Apr 8-11
Frost Apr 4-11
Moon Apr 8-11
Sep 8

Planting Dates for Fall

On average, your first fall frost occurs on November 10 (at SEATTLE BOEING FLD, WA climate station).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds OutdoorsTransplantAverage Days to MaturityFrost Tolerance
ArugulaFrost Sep 22-Oct 27
Moon Oct 2-17
N/A40Frost-hardy
BeetsFrost Aug 18-Sep 15
Moon Aug 20-Sep 1
N/A50Frost-tolerant
Bok ChoyFrost Sep 1-22
Moon Sep 2-17
N/A50Frost-tolerant
BroccoliFrost Aug 11-18
Moon Aug 11-18
Frost Sep 1-15
Moon Sep 2-15
60Frost-tolerant
Brussels SproutsFrost Jul 21-Aug 4
Moon Jul 21
N/A100Frost-hardy
CabbageFrost Aug 11-18
Moon Aug 11-18
Frost Sep 1-8
Moon Sep 2-8
90Frost-tolerant
CarrotsFrost Aug 25-Sep 1
Moon Aug 25-Sep 1
N/A70Frost-tolerant
CauliflowerFrost Aug 4-11
Moon Aug 4-11
Frost Aug 18-25
Moon Aug 18-19
75Frost-tolerant
ChivesFrost Aug 18-Sep 15
Moon Aug 18-19, Sep 2-15
N/A70Frost-tolerant
FennelFrost Aug 11-25
Moon Aug 11-19
N/A80Tender
GarlicFrost Nov 24-Dec 8
Moon Nov 24-30
N/A120Frost-hardy
Green BeansFrost Aug 25-Sep 8
Moon Sep 2-8
N/A55Tender
KaleFrost Sep 1-15
Moon Sep 2-15
N/A60Frost-hardy
KohlrabiFrost Sep 8-29
Moon Sep 8-17
N/A45Frost-tolerant
LettuceFrost Sep 1-15
Moon Sep 2-15
N/A60Frost-tolerant
Mustard GreensFrost Sep 8-29
Moon Sep 8-17
N/A45Tender
PeasFrost Sep 1-15
Moon Sep 2-15
N/A55Tender
RadishesFrost Sep 29-Oct 13
Moon Sep 29-Oct 1
N/A25Frost-tolerant
SpinachFrost Sep 22-Oct 13
Moon Oct 2-13
N/A30Frost-hardy
Swiss ChardFrost Sep 1-15
Moon Sep 2-15
N/A60Frost-tolerant
TurnipsFrost Sep 8-22
Moon Sep 18-22
N/A50Frost-tolerant
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