Marysville, WA planting zone & frost dates
Marysville is in USDA hardiness zone 8b. The last spring frost usually comes around March 24 and the first fall frost around November 2, for a growing season of about 223 days.
Planting calendar for Marysville
Dates are counted from the average last spring frost (March 24) 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: Jan 27 – Feb 10 Transplant outdoors: Mar 31 – Apr 7 |
| Peppers | Start seeds indoors: Jan 13 – Jan 27 Transplant outdoors: Apr 7 – Apr 14 |
| Eggplant | Start seeds indoors: Jan 13 – Jan 27 Transplant outdoors: Apr 7 – Apr 14 |
| Broccoli | Start seeds indoors: Jan 13 – Jan 27 Transplant outdoors: Feb 24 – Mar 10 |
| Cabbage | Start seeds indoors: Jan 13 – Jan 27 Transplant outdoors: Feb 24 – Mar 10 |
| Onions (sets) | Plant outdoors: Feb 24 – Mar 10 |
| Peas | Sow outdoors: Feb 10 – Feb 24 |
| Spinach | Sow outdoors: Feb 10 – Feb 24 |
| Lettuce | Sow outdoors: Feb 24 – Mar 10 |
| Carrots | Sow outdoors: Feb 24 – Mar 10 |
| Potatoes | Plant outdoors: Feb 24 – Mar 10 |
| Beans | Sow outdoors: Mar 31 – Apr 7 |
| Sweet corn | Sow outdoors: Mar 31 – Apr 7 |
| Cucumbers | Sow outdoors: Mar 31 – Apr 7 |
| Squash & zucchini | Sow outdoors: Mar 31 – Apr 7 |
| Basil | Start seeds indoors: Feb 10 – Feb 24 Transplant outdoors: Mar 31 – Apr 7 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 7 (8 weeks before the average first fall frost on Nov 2).
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 4 | Mar 24 | Apr 11 |
| First 32°F frost in fall is before | Nov 23 | Nov 2 | Oct 16 |
How to read it: in spring there is a 10% chance of a frost after April 11, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 16. A hard freeze (28°F) usually ends around March 1.
Hardiness zone by ZIP code in Marysville
- 98270 zone 8b
- 98271 zone 8b
Nearby cities
- Everett zone 8b, last frost Mar 24
- West Lake Stevens zone 8b, last frost Mar 24
- Lake Stevens zone 8b, last frost Mar 24
- Eastmont zone 8b, last frost Mar 9
- Arlington zone 8a, last frost Apr 22
- Mukilteo zone 8b, last frost Mar 9
- Silver Firs zone 8b, last frost Mar 9
- Mill Creek zone 8b, last frost Mar 9
Questions
What growing zone is Marysville, WA?
Marysville is in USDA Plant Hardiness Zone 8b (average extreme winter low 15°F to 20°F), according to the USDA 2023 map.
When is the last frost in Marysville?
The average last spring frost (32°F) in Marysville is March 24. There is still a 10% chance of frost until April 11.
When can I plant tomatoes in Marysville?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 31 – Apr 7. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Everett, WA (USC00452675), 8.6 km (5.3 mi) from the city center, elevation 18 m, based on 27 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.