Agate Beach, OR planting zone & frost dates

Agate Beach is in USDA hardiness zone 9b. The last spring frost usually comes around March 12 and the first fall frost around December 10, for a growing season of about 271 days.

USDA hardiness zone9bavg. extreme winter low 25°F to 30°F

Average last spring frostMarch 1290% chance of no frost after April 16

Average first fall frostDecember 1010% chance of frost by November 7

Growing season271 daysfrost-free days in an average year

Planting calendar for Agate Beach

Dates are counted from the average last spring frost (March 12) 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 15 – Jan 29 Transplant outdoors: Mar 19 – Mar 26
Peppers	Start seeds indoors: Jan 1 – Jan 15 Transplant outdoors: Mar 26 – Apr 2
Eggplant	Start seeds indoors: Jan 1 – Jan 15 Transplant outdoors: Mar 26 – Apr 2
Broccoli	Start seeds indoors: Jan 1 – Jan 15 Transplant outdoors: Feb 12 – Feb 26
Cabbage	Start seeds indoors: Jan 1 – Jan 15 Transplant outdoors: Feb 12 – Feb 26
Onions (sets)	Plant outdoors: Feb 12 – Feb 26
Peas	Sow outdoors: Jan 29 – Feb 12
Spinach	Sow outdoors: Jan 29 – Feb 12
Lettuce	Sow outdoors: Feb 12 – Feb 26
Carrots	Sow outdoors: Feb 12 – Feb 26
Potatoes	Plant outdoors: Feb 12 – Feb 26
Beans	Sow outdoors: Mar 19 – Mar 26
Sweet corn	Sow outdoors: Mar 19 – Mar 26
Cucumbers	Sow outdoors: Mar 19 – Mar 26
Squash & zucchini	Sow outdoors: Mar 19 – Mar 26
Basil	Start seeds indoors: Jan 29 – Feb 12 Transplant outdoors: Mar 19 – Mar 26

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 15 (8 weeks before the average first fall frost on Dec 10).

Useful for zone 9b 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	Jan 24	Mar 12	Apr 16
First 32°F frost in fall is before	Feb 8	Dec 10	Nov 7

How to read it: in spring there is a 10% chance of a frost after April 16, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 7. A hard freeze (28°F) usually ends around January 28.

Nearby cities

Newport zone 9b, last frost Mar 21
Dallas zone 8b, last frost Apr 16
Corvallis zone 8b, last frost Apr 17
Monmouth zone 8b, last frost Apr 16
Albany zone 8b, last frost Apr 17
McMinnville zone 8b, last frost Apr 5
Salem zone 8b, last frost Apr 3
Keizer zone 8b, last frost Apr 3

All cities in Oregon → · Other zone 9b cities →

Questions

What growing zone is Agate Beach, OR?

Agate Beach is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map.

When is the last frost in Agate Beach?

The average last spring frost (32°F) in Agate Beach is March 12. There is still a 10% chance of frost until April 16.

When can I plant tomatoes in Agate Beach?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 19 – Mar 26. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Newport 3N, OR (USC00356035), 0.8 km (0.5 mi) from the city center, elevation 67 m, based on 12 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.