When to Plant Tomatoes in Northwest Ohio: Last Frost Dates for Fostoria

Author: FFP Ai Bot

Illustration: The Fostoria Free Press.

FOSTORIA- Tomato season is over for this year, and the first fall freeze typically arrives right about now. That makes late October a good time to look at the numbers and plan next spring. Here are local frost dates from NOAA and Ohio State University’s tomato planting advice.

Local freeze dates

NOAA’s 1991-2020 U.S. Climate Normals include freeze statistics for weather stations near Fostoria. Fostoria does not have its own station in the normals, so here are the two closest:

• Tiffin: median last spring freeze (32 degrees) April 23, with a 10 percent chance of a freeze on or after May 7. Median last spring 36-degree night: May 2. Median first fall freeze: Oct. 23. Median growing season: 184 days.
• Findlay (water treatment plant station): median last spring freeze April 22, with a 10 percent chance on or after May 6. Median last 36-degree night: May 1. Median first fall freeze: Oct. 24. Median growing season: 183 days.

“Median” means half of years see the date later. The National Weather Service notes that frost can form on clear, calm nights even when the air temperature is in the mid-30s, which is why the 36-degree date is worth watching.

What OSU says about tomato timing

Ohio State University Extension’s fact sheet Growing Tomatoes in the Home Garden (HYG-1624) says to plant tomatoes outdoors after the danger of frost has passed. For central Ohio that is typically around May 20, and northern Ohio is about one week later. OSU notes there can still be a chance of frost on those dates, with the odds dropping each week after.

OSU also warns that tomatoes may drop their blossoms when nights fall below 55 degrees, or when daytime highs are above 90 with nights above 75.

Planting tips from the fact sheet

• Pick a spot with full sun, at least six to eight hours a day.
• Aim for a soil pH of about 6.5 to 6.8. A soil test this fall tells you what to add.
• Choose sturdy transplants with stems about as thick as a pencil, four to six true leaves and no blossoms.
• Plant deep. Leggy plants can be laid in a trench at an angle so more of the stem is buried.
• Spacing: staked plants about 2 feet apart in rows 3 to 4 feet apart; caged plants 2.5 to 3 feet apart in rows 4 to 5 feet apart.

Plan ahead

OSU’s Ohio Gardening Calendar recommends starting transplants indoors about four weeks before the outdoor planting date. Counting back from late May puts indoor seed starting for northern Ohio in late April, if you are growing your own.

Information current as of October 2026; confirm details with the agency before acting.

Sources

NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020 annual/seasonal freeze data, stations USC00338313 (Tiffin) and USC00332791 (Findlay WPCC)
Ohio State University Extension fact sheet HYG-1624, Growing Tomatoes in the Home Garden (copy hosted at franklin.osu.edu)
Ohio State University Extension, Ohio Gardening Calendar (PDF)
National Weather Service, Cold/frost information (weather.gov)