Inglewood-Finn Hill, WA planting zone & frost dates
Inglewood-Finn Hill is in USDA hardiness zone 9a. The last spring frost usually comes around March 8 and the first fall frost around November 23, for a growing season of about 259 days.
Planting calendar for Inglewood-Finn Hill
Dates are counted from the average last spring frost (March 8) 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 11 – Jan 25 Transplant outdoors: Mar 15 – Mar 22 |
| Peppers | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Eggplant | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Mar 22 – Mar 29 |
| Broccoli | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Cabbage | Start seeds indoors: Dec 28 – Jan 11 Transplant outdoors: Feb 8 – Feb 22 |
| Onions (sets) | Plant outdoors: Feb 8 – Feb 22 |
| Peas | Sow outdoors: Jan 25 – Feb 8 |
| Spinach | Sow outdoors: Jan 25 – Feb 8 |
| Lettuce | Sow outdoors: Feb 8 – Feb 22 |
| Carrots | Sow outdoors: Feb 8 – Feb 22 |
| Potatoes | Plant outdoors: Feb 8 – Feb 22 |
| Beans | Sow outdoors: Mar 15 – Mar 22 |
| Sweet corn | Sow outdoors: Mar 15 – Mar 22 |
| Cucumbers | Sow outdoors: Mar 15 – Mar 22 |
| Squash & zucchini | Sow outdoors: Mar 15 – Mar 22 |
| Basil | Start seeds indoors: Jan 25 – Feb 8 Transplant outdoors: Mar 15 – Mar 22 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 28 (8 weeks before the average first fall frost on Nov 23).
Useful for zone 9a 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
- Shade cloth — for hot summers
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Feb 13 | Mar 8 | Mar 29 |
| First 32°F frost in fall is before | Dec 16 | Nov 23 | Nov 4 |
How to read it: in spring there is a 10% chance of a frost after March 29, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 4. A hard freeze (28°F) usually ends around February 11.
Nearby cities
- Kenmore zone 9a, last frost Mar 8
- Kirkland zone 8b, last frost Mar 8
- Bothell zone 8b, last frost Mar 8
- Lake Forest Park zone 9a, last frost Mar 8
- Woodinville zone 8b, last frost Mar 8
- Bothell West zone 8b, last frost Mar 9
- Mountlake Terrace zone 9a, last frost Mar 8
- North Creek zone 8b, last frost Mar 9
Questions
What growing zone is Inglewood-Finn Hill, WA?
Inglewood-Finn Hill is in USDA Plant Hardiness Zone 9a (average extreme winter low 20°F to 25°F), according to the USDA 2023 map.
When is the last frost in Inglewood-Finn Hill?
The average last spring frost (32°F) in Inglewood-Finn Hill is March 8. There is still a 10% chance of frost until March 29.
When can I plant tomatoes in Inglewood-Finn Hill?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 15 – Mar 22. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Seattle Sand Pt Wsfo, WA (USW00094290), 4.1 km (2.5 mi) from the city center, elevation 18 m, based on 29 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.