Unionville, OH frost dates
Last spring frostApr 15median date
First fall frostNov 9median date
Growing season208 daysfrost-free
Hardiness zone6bZone 6b
How Unionville compares
- In 8 years out of 10, the last spring frost in Unionville falls between April 2 and April 27, a 25-day window. The first fall frost falls between October 30 and November 25.
- The median last frost is 9 days earlier than the Ohio median of Apr 24.
- Its 208-day growing season is among the longest of the 1,063 Ohio places with a regular frost season.
- The last frost is 7 days earlier than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 100 nights a year at or below 32°F.
- Compared with Cleveland, OH, 61 km away, the last frost here is 7 days later than there and the growing season is 10 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 2 |
| 50% (median) | April 15 |
| 10% (safe for tender plants) | April 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 30 |
| 50% (median) | November 9 |
| 90% (late) | November 25 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Unionville, OH
Unionville, OH frost dates — last frost Apr 15, first frost Nov 9, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Jan 21 to Feb 4Transplant outside: Mar 18 to Apr 1
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 29 to May 13
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 29 to May 13
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 22 to May 6
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 25 to Apr 8Sow outdoors: Mar 18 to Apr 22Plant for fall: Sep 14 to Oct 12
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 18 to Apr 1Plant for fall: Aug 31 to Sep 21
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 1 to Apr 15Plant for fall: Aug 3 to Aug 24
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 25 to Apr 8Plant for fall: Aug 3 to Aug 24
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 1 to Apr 15Plant for fall: Aug 3 to Aug 24
Start indoors: Mar 4 to Mar 18Transplant outside: May 6 to May 20Sow outdoors: May 6 to May 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 22 to May 6
Sow outdoors: Mar 4 to Mar 25Plant for fall: Aug 17 to Sep 7
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 14 to Oct 5
Sow outdoors: Mar 11 to Apr 22Plant for fall: Sep 28 to Oct 19
Start indoors: Mar 18 to Mar 25Transplant outside: Apr 29 to May 6Sow outdoors: Apr 22 to May 6Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 18 to Mar 25Sow outdoors: Apr 22 to May 6Plant for fall: Aug 31 to Sep 14
Start indoors: Mar 18 to Mar 25Sow outdoors: Apr 22 to May 6
Start indoors: Mar 18 to Mar 25Transplant outside: Apr 29 to May 13
Sow outdoors: Mar 25 to Apr 22Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 25 to Apr 22Plant for fall: Aug 31 to Sep 14
Sow outdoors: Mar 25 to Apr 15
Sow outdoors: Apr 1 to Apr 29Plant for fall: Aug 31 to Sep 14
Sow outdoors: Apr 1 to Apr 22Plant for fall: Sep 14 to Oct 5
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 24 to Sep 7
Sow outdoors: Apr 22 to May 6
Transplant outside: Apr 29 to May 20
Plant for fall: Oct 26 to Nov 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Unionville, OH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 21 – Feb 4 | Mar 18 – Apr 1 | — | — |
| Peppers | Feb 4 – Feb 18 | Apr 29 – May 13 | — | — |
| Eggplant | Feb 4 – Feb 18 | Apr 29 – May 13 | — | — |
| Tomatoes | Feb 18 – Mar 4 | Apr 22 – May 6 | — | — |
| Lettuce | Feb 18 – Mar 4 | Mar 25 – Apr 8 | Mar 18 – Apr 22 | Sep 14 – Oct 12 |
| Kale | Feb 18 – Mar 4 | Mar 18 – Apr 1 | Mar 18 – Apr 1 | Aug 31 – Sep 21 |
| Broccoli | Feb 18 – Mar 4 | Apr 1 – Apr 15 | — | Aug 3 – Aug 24 |
| Cabbage | Feb 18 – Mar 4 | Mar 25 – Apr 8 | — | Aug 3 – Aug 24 |
| Cauliflower | Feb 18 – Mar 4 | Apr 1 – Apr 15 | — | Aug 3 – Aug 24 |
| Okra | Mar 4 – Mar 18 | May 6 – May 20 | May 6 – May 20 | — |
| Basil | Mar 4 – Mar 18 | Apr 22 – May 6 | — | — |
| Peas | — | — | Mar 4 – Mar 25 | Aug 17 – Sep 7 |
| Spinach | — | — | Mar 4 – Mar 25 | Sep 14 – Oct 5 |
| Radishes | — | — | Mar 11 – Apr 22 | Sep 28 – Oct 19 |
| Cucumbers | Mar 18 – Mar 25 | Apr 29 – May 6 | Apr 22 – May 6 | Aug 24 – Sep 7 |
| Zucchini & Summer Squash | Mar 18 – Mar 25 | — | Apr 22 – May 6 | Aug 31 – Sep 14 |
| Winter Squash & Pumpkins | Mar 18 – Mar 25 | — | Apr 22 – May 6 | — |
| Melons & Watermelon | Mar 18 – Mar 25 | Apr 29 – May 13 | — | — |
| Carrots | — | — | Mar 25 – Apr 22 | Aug 17 – Aug 31 |
| Beets | — | — | Mar 25 – Apr 22 | Aug 31 – Sep 14 |
| Potatoes | — | — | Mar 25 – Apr 15 | — |
| Swiss Chard | — | — | Apr 1 – Apr 29 | Aug 31 – Sep 14 |
| Cilantro | — | — | Apr 1 – Apr 22 | Sep 14 – Oct 5 |
| Green Beans | — | — | Apr 22 – May 13 | Aug 24 – Sep 7 |
| Sweet Corn | — | — | Apr 22 – May 6 | — |
| Sweet Potatoes | — | Apr 29 – May 20 | — | — |
| Garlic | — | — | — | Oct 26 – Nov 30 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Painesville 4 Nw, OH weather station, 24 km away (elevation 600 ft (183 m)).
Frost dates near Unionville
- Geneva May 2 · Oct 21
- Madison Apr 15 · Nov 9
- Perry Apr 15 · Nov 9
- Austinburg May 2 · Oct 21
- Thompson May 5 · Oct 18
- Rock Creek May 10 · Oct 10
- Painesville Apr 15 · Nov 9
- Ashtabula May 2 · Oct 21
- Montville May 5 · Oct 18
- Jefferson May 2 · Oct 21
Frequently asked questions
When is the last frost in Unionville, OH?
The median last spring frost in Unionville, OH is April 15. There is still about a 10% chance of frost after April 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Unionville, OH?
The median first fall frost is November 9, with about a 10% chance of frost before October 30.
How long is the growing season in Unionville, OH?
About 208 days between the median last spring frost and first fall frost.
What planting zone is Unionville, OH?
Unionville, OH is in USDA hardiness zone 6b.