Bucyrus, OH planting zone & frost dates

Bucyrus is in USDA hardiness zone 6a. The last spring frost usually comes around April 19 and the first fall frost around October 27, for a growing season of about 190 days.

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

Average last spring frostApril 1990% chance of no frost after May 6

Average first fall frostOctober 2710% chance of frost by October 14

Growing season190 daysfrost-free days in an average year

Planting calendar for Bucyrus

Dates are counted from the average last spring frost (April 19) 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 22 – Mar 8 Transplant outdoors: Apr 26 – May 3
Peppers	Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: May 3 – May 10
Eggplant	Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: May 3 – May 10
Broccoli	Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: Mar 22 – Apr 5
Cabbage	Start seeds indoors: Feb 8 – Feb 22 Transplant outdoors: Mar 22 – Apr 5
Onions (sets)	Plant outdoors: Mar 22 – Apr 5
Peas	Sow outdoors: Mar 8 – Mar 22
Spinach	Sow outdoors: Mar 8 – Mar 22
Lettuce	Sow outdoors: Mar 22 – Apr 5
Carrots	Sow outdoors: Mar 22 – Apr 5
Potatoes	Plant outdoors: Mar 22 – Apr 5
Beans	Sow outdoors: Apr 26 – May 3
Sweet corn	Sow outdoors: Apr 26 – May 3
Cucumbers	Sow outdoors: Apr 26 – May 3
Squash & zucchini	Sow outdoors: Apr 26 – May 3
Basil	Start seeds indoors: Mar 8 – Mar 22 Transplant outdoors: Apr 26 – May 3

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 1 (8 weeks before the average first fall frost on Oct 27).

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

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Frost risk in detail

	90% chance	50% chance	10% chance
Last 32°F frost in spring is after	Apr 5	Apr 19	May 6
First 32°F frost in fall is before	Nov 10	Oct 27	Oct 14

How to read it: in spring there is a 10% chance of a frost after May 6, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 14. A hard freeze (28°F) usually ends around April 7.

Hardiness zone by ZIP code in Bucyrus

44820 zone 6a

Nearby cities

Galion zone 6a, last frost Apr 26
Marion zone 6a, last frost Apr 25
Tiffin zone 6a, last frost Apr 23
Mansfield zone 6a, last frost Apr 26
Delaware zone 6b, last frost Apr 19
Fremont zone 6b, last frost Apr 26
Fostoria zone 6b, last frost Apr 23
Norwalk zone 6a, last frost Apr 25

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

Questions

What growing zone is Bucyrus, OH?

Bucyrus 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 Bucyrus?

The average last spring frost (32°F) in Bucyrus is April 19. There is still a 10% chance of frost until May 6.

When can I plant tomatoes in Bucyrus?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 26 – May 3. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Bucyrus, OH (USC00331072), 0.7 km (0.4 mi) from the city center, elevation 291 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.