Mansfield, OH planting zone & frost dates

Mansfield is in USDA hardiness zone 6a. The last spring frost usually comes around April 26 and the first fall frost around October 22, for a growing season of about 177 days.

USDA hardiness zone6aavg. extreme winter low -10°F to -5°F

Average last spring frostApril 2690% chance of no frost after May 12

Average first fall frostOctober 2210% chance of frost by October 6

Growing season177 daysfrost-free days in an average year

Planting calendar for Mansfield

Dates are counted from the average last spring frost (April 26) 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: Mar 1 – Mar 15 Transplant outdoors: May 3 – May 10
Peppers	Start seeds indoors: Feb 15 – Mar 1 Transplant outdoors: May 10 – May 17
Eggplant	Start seeds indoors: Feb 15 – Mar 1 Transplant outdoors: May 10 – May 17
Broccoli	Start seeds indoors: Feb 15 – Mar 1 Transplant outdoors: Mar 29 – Apr 12
Cabbage	Start seeds indoors: Feb 15 – Mar 1 Transplant outdoors: Mar 29 – Apr 12
Onions (sets)	Plant outdoors: Mar 29 – Apr 12
Peas	Sow outdoors: Mar 15 – Mar 29
Spinach	Sow outdoors: Mar 15 – Mar 29
Lettuce	Sow outdoors: Mar 29 – Apr 12
Carrots	Sow outdoors: Mar 29 – Apr 12
Potatoes	Plant outdoors: Mar 29 – Apr 12
Beans	Sow outdoors: May 3 – May 10
Sweet corn	Sow outdoors: May 3 – May 10
Cucumbers	Sow outdoors: May 3 – May 10
Squash & zucchini	Sow outdoors: May 3 – May 10
Basil	Start seeds indoors: Mar 15 – Mar 29 Transplant outdoors: May 3 – May 10

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Aug 27 (8 weeks before the average first fall frost on Oct 22).

Useful for zone 6a 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
Cold frame / mini greenhouse — adds weeks to a short season

As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.

Frost risk in detail

	90% chance	50% chance	10% chance
Last 32°F frost in spring is after	Apr 14	Apr 26	May 12
First 32°F frost in fall is before	Nov 4	Oct 22	Oct 6

How to read it: in spring there is a 10% chance of a frost after May 12, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 6. A hard freeze (28°F) usually ends around April 16.

Hardiness zone by ZIP code in Mansfield

44901 zone 6a
44902 zone 6a
44903 zone 6a
44904 zone 6a
44905 zone 6a
44906 zone 6a
44907 zone 6a

Nearby cities

Ashland zone 6a, last frost Apr 30
Galion zone 6a, last frost Apr 26
Mount Vernon zone 6a, last frost May 1
Bucyrus zone 6a, last frost Apr 19
Norwalk zone 6a, last frost Apr 25
Wooster zone 6a, last frost Apr 30
Marion zone 6a, last frost Apr 25
Vermilion zone 6b, last frost Apr 24

All cities in Ohio → · Other zone 6a cities →

Questions

What growing zone is Mansfield, OH?

Mansfield is in USDA Plant Hardiness Zone 6a (average extreme winter low -10°F to -5°F), according to the USDA 2023 map.

When is the last frost in Mansfield?

The average last spring frost (32°F) in Mansfield is April 26. There is still a 10% chance of frost until May 12.

When can I plant tomatoes in Mansfield?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around May 3 – May 10. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Mansfield Lahm Muni Ap, OH (USW00014891), 6.9 km (4.3 mi) from the city center, elevation 395 m, based on 28 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.