Enumclaw, WA planting zone & frost dates
Enumclaw is in USDA hardiness zone 8b. The last spring frost usually comes around April 7 and the first fall frost around October 30, for a growing season of about 204 days.
Planting calendar for Enumclaw
Dates are counted from the average last spring frost (April 7) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Feb 10 – Feb 24 Transplant outdoors: Apr 14 – Apr 21 |
| Peppers | Start seeds indoors: Jan 27 – Feb 10 Transplant outdoors: Apr 21 – Apr 28 |
| Eggplant | Start seeds indoors: Jan 27 – Feb 10 Transplant outdoors: Apr 21 – Apr 28 |
| Broccoli | Start seeds indoors: Jan 27 – Feb 10 Transplant outdoors: Mar 10 – Mar 24 |
| Cabbage | Start seeds indoors: Jan 27 – Feb 10 Transplant outdoors: Mar 10 – Mar 24 |
| Onions (sets) | Plant outdoors: Mar 10 – Mar 24 |
| Peas | Sow outdoors: Feb 24 – Mar 10 |
| Spinach | Sow outdoors: Feb 24 – Mar 10 |
| Lettuce | Sow outdoors: Mar 10 – Mar 24 |
| Carrots | Sow outdoors: Mar 10 – Mar 24 |
| Potatoes | Plant outdoors: Mar 10 – Mar 24 |
| Beans | Sow outdoors: Apr 14 – Apr 21 |
| Sweet corn | Sow outdoors: Apr 14 – Apr 21 |
| Cucumbers | Sow outdoors: Apr 14 – Apr 21 |
| Squash & zucchini | Sow outdoors: Apr 14 – Apr 21 |
| Basil | Start seeds indoors: Feb 24 – Mar 10 Transplant outdoors: Apr 14 – Apr 21 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 4 (8 weeks before the average first fall frost on Oct 30).
Useful for zone 8b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 16 | Apr 7 | Apr 27 |
| First 32°F frost in fall is before | Nov 22 | Oct 30 | Oct 8 |
How to read it: in spring there is a 10% chance of a frost after April 27, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 8. A hard freeze (28°F) usually ends around March 8.
Hardiness zone by ZIP code in Enumclaw
- 98022 zone 8a
Nearby cities
- Lake Morton-Berrydale zone 8b, last frost Apr 20
- Prairie Ridge zone 8b, last frost Apr 11
- Maple Valley zone 8b, last frost Apr 20
- Bonney Lake zone 8b, last frost Apr 11
- Covington zone 8b, last frost Mar 20
- Lea Hill zone 8b, last frost Mar 20
- Auburn zone 8b, last frost Mar 20
- East Hill-Meridian zone 8b, last frost Mar 20
Questions
What growing zone is Enumclaw, WA?
Enumclaw is in USDA Plant Hardiness Zone 8b (average extreme winter low 15°F to 20°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 8a.
When is the last frost in Enumclaw?
The average last spring frost (32°F) in Enumclaw is April 7. There is still a 10% chance of frost until April 27.
When can I plant tomatoes in Enumclaw?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 14 – Apr 21. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Buckley 1 Ne, WA (USC00450945), 4.0 km (2.5 mi) from the city center, elevation 209 m, based on 11 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.