Retsil, WA frost dates
Last spring frostMar 29median date
First fall frostNov 14median date
Growing season230 daysfrost-free
Hardiness zone9aZone 9a
How Retsil compares
- In 8 years out of 10, the last spring frost in Retsil falls between March 5 and April 24, a 50-day window. The first fall frost falls between October 26 and December 1.
- The median last frost is 23 days earlier than the Washington median of Apr 21.
- Its 230-day growing season is longer than 82% of the 491 Washington places with a regular frost season (state median 182 days).
- The last frost is 26 days later than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 42 nights a year at or below 32°F.
- Compared with Seattle, WA, 22 km away, the last frost here is 16 days later than there and the growing season is 19 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 5 |
| 50% (median) | March 29 |
| 10% (safe for tender plants) | April 24 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 26 |
| 50% (median) | November 14 |
| 90% (late) | December 1 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Retsil, WA
Retsil, WA frost dates — last frost Mar 29, first frost Nov 14, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Jan 4 to Jan 18Transplant outside: Mar 1 to Mar 15
Start indoors: Jan 18 to Feb 1Transplant outside: Apr 12 to Apr 26
Start indoors: Jan 18 to Feb 1Transplant outside: Apr 12 to Apr 26
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 5 to Apr 19
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 8 to Mar 22Sow outdoors: Mar 1 to Apr 5Plant for fall: Sep 19 to Oct 17
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 1 to Mar 15Sow outdoors: Mar 1 to Mar 15Plant for fall: Sep 5 to Sep 26
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 15 to Mar 29Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 8 to Mar 22Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 15 to Mar 29Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 15 to Mar 1Transplant outside: Apr 19 to May 3Sow outdoors: Apr 19 to May 3
Start indoors: Feb 15 to Mar 1Transplant outside: Apr 5 to Apr 19
Sow outdoors: Feb 15 to Mar 8Plant for fall: Aug 22 to Sep 12
Sow outdoors: Feb 15 to Mar 8Plant for fall: Sep 19 to Oct 10
Sow outdoors: Feb 22 to Apr 5Plant for fall: Oct 3 to Oct 24
Start indoors: Mar 1 to Mar 8Transplant outside: Apr 12 to Apr 19Sow outdoors: Apr 5 to Apr 19Plant for fall: Aug 29 to Sep 12
Start indoors: Mar 1 to Mar 8Sow outdoors: Apr 5 to Apr 19Plant for fall: Sep 5 to Sep 19
Start indoors: Mar 1 to Mar 8Sow outdoors: Apr 5 to Apr 19
Start indoors: Mar 1 to Mar 8Transplant outside: Apr 12 to Apr 26
Sow outdoors: Mar 8 to Apr 5Plant for fall: Aug 22 to Sep 5
Sow outdoors: Mar 8 to Apr 5Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 8 to Mar 29
Sow outdoors: Mar 15 to Apr 12Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 15 to Apr 5Plant for fall: Sep 19 to Oct 10
Sow outdoors: Apr 5 to Apr 26Plant for fall: Aug 29 to Sep 12
Sow outdoors: Apr 5 to Apr 19
Transplant outside: Apr 12 to May 3
Plant for fall: Oct 31 to Dec 5
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Retsil, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 4 – Jan 18 | Mar 1 – Mar 15 | — | — |
| Peppers | Jan 18 – Feb 1 | Apr 12 – Apr 26 | — | — |
| Eggplant | Jan 18 – Feb 1 | Apr 12 – Apr 26 | — | — |
| Tomatoes | Feb 1 – Feb 15 | Apr 5 – Apr 19 | — | — |
| Lettuce | Feb 1 – Feb 15 | Mar 8 – Mar 22 | Mar 1 – Apr 5 | Sep 19 – Oct 17 |
| Kale | Feb 1 – Feb 15 | Mar 1 – Mar 15 | Mar 1 – Mar 15 | Sep 5 – Sep 26 |
| Broccoli | Feb 1 – Feb 15 | Mar 15 – Mar 29 | — | Aug 8 – Aug 29 |
| Cabbage | Feb 1 – Feb 15 | Mar 8 – Mar 22 | — | Aug 8 – Aug 29 |
| Cauliflower | Feb 1 – Feb 15 | Mar 15 – Mar 29 | — | Aug 8 – Aug 29 |
| Okra | Feb 15 – Mar 1 | Apr 19 – May 3 | Apr 19 – May 3 | — |
| Basil | Feb 15 – Mar 1 | Apr 5 – Apr 19 | — | — |
| Peas | — | — | Feb 15 – Mar 8 | Aug 22 – Sep 12 |
| Spinach | — | — | Feb 15 – Mar 8 | Sep 19 – Oct 10 |
| Radishes | — | — | Feb 22 – Apr 5 | Oct 3 – Oct 24 |
| Cucumbers | Mar 1 – Mar 8 | Apr 12 – Apr 19 | Apr 5 – Apr 19 | Aug 29 – Sep 12 |
| Zucchini & Summer Squash | Mar 1 – Mar 8 | — | Apr 5 – Apr 19 | Sep 5 – Sep 19 |
| Winter Squash & Pumpkins | Mar 1 – Mar 8 | — | Apr 5 – Apr 19 | — |
| Melons & Watermelon | Mar 1 – Mar 8 | Apr 12 – Apr 26 | — | — |
| Carrots | — | — | Mar 8 – Apr 5 | Aug 22 – Sep 5 |
| Beets | — | — | Mar 8 – Apr 5 | Sep 5 – Sep 19 |
| Potatoes | — | — | Mar 8 – Mar 29 | — |
| Swiss Chard | — | — | Mar 15 – Apr 12 | Sep 5 – Sep 19 |
| Cilantro | — | — | Mar 15 – Apr 5 | Sep 19 – Oct 10 |
| Green Beans | — | — | Apr 5 – Apr 26 | Aug 29 – Sep 12 |
| Sweet Corn | — | — | Apr 5 – Apr 19 | — |
| Sweet Potatoes | — | Apr 12 – May 3 | — | — |
| Garlic | — | — | — | Oct 31 – Dec 5 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Bremerton, WA weather station, 6 km away (elevation 112 ft (34 m)).
Frost dates near Retsil
- Port Orchard Mar 29 · Nov 14
- Bremerton Mar 29 · Nov 14
- Manchester Mar 29 · Nov 14
- South Colby Mar 29 · Nov 14
- Southworth Mar 13 · Nov 17
- Tracyton Mar 29 · Nov 14
- Bainbridge Island Mar 29 · Nov 14
- Olalla Mar 11 · Nov 21
- Burley Mar 29 · Nov 14
- Rollingbay Mar 29 · Nov 14
Frequently asked questions
When is the last frost in Retsil, WA?
The median last spring frost in Retsil, WA is March 29. There is still about a 10% chance of frost after April 24, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Retsil, WA?
The median first fall frost is November 14, with about a 10% chance of frost before October 26.
How long is the growing season in Retsil, WA?
About 230 days between the median last spring frost and first fall frost.
What planting zone is Retsil, WA?
Retsil, WA is in USDA hardiness zone 9a.