Griffin, IN frost dates
Last spring frostApr 7median date
First fall frostOct 25median date
Growing season201 daysfrost-free
Hardiness zone7aZone 7a
How Griffin compares
- In 8 years out of 10, the last spring frost in Griffin falls between March 24 and April 23, a 30-day window. The first fall frost falls between October 12 and November 7.
- The median last frost is 15 days earlier than the Indiana median of Apr 22.
- Its 201-day growing season is longer than 89% of the 733 Indiana places with a regular frost season (state median 182 days).
- The last frost is 9 days earlier than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 97 nights a year at or below 32°F.
- Compared with Evansville, IN, 38 km away, the last frost here is 9 days later than there and the growing season is 25 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 24 |
| 50% (median) | April 7 |
| 10% (safe for tender plants) | April 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 12 |
| 50% (median) | October 25 |
| 90% (late) | November 7 |
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 Griffin, IN
Griffin, IN frost dates — last frost Apr 7, first frost Oct 25, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 13 to Jan 27Transplant outside: Mar 10 to Mar 24
Start indoors: Jan 27 to Feb 10Transplant outside: Apr 21 to May 5
Start indoors: Jan 27 to Feb 10Transplant outside: Apr 21 to May 5
Start indoors: Feb 10 to Feb 24Transplant outside: Apr 14 to Apr 28
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 17 to Mar 31Sow outdoors: Mar 10 to Apr 14Plant for fall: Aug 30 to Sep 27
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 10 to Mar 24Sow outdoors: Mar 10 to Mar 24Plant for fall: Aug 16 to Sep 6
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 24 to Apr 7Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 17 to Mar 31Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 24 to Apr 7Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 24 to Mar 10Transplant outside: Apr 28 to May 12Sow outdoors: Apr 28 to May 12
Start indoors: Feb 24 to Mar 10Transplant outside: Apr 14 to Apr 28
Sow outdoors: Feb 24 to Mar 17Plant for fall: Aug 2 to Aug 23
Sow outdoors: Feb 24 to Mar 17Plant for fall: Aug 30 to Sep 20
Sow outdoors: Mar 3 to Apr 14Plant for fall: Sep 13 to Oct 4
Start indoors: Mar 10 to Mar 17Transplant outside: Apr 21 to Apr 28Sow outdoors: Apr 14 to Apr 28Plant for fall: Aug 9 to Aug 23
Start indoors: Mar 10 to Mar 17Sow outdoors: Apr 14 to Apr 28Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 10 to Mar 17Sow outdoors: Apr 14 to Apr 28
Start indoors: Mar 10 to Mar 17Transplant outside: Apr 21 to May 5
Sow outdoors: Mar 17 to Apr 14Plant for fall: Aug 2 to Aug 16
Sow outdoors: Mar 17 to Apr 14Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 17 to Apr 7
Sow outdoors: Mar 24 to Apr 21Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 24 to Apr 14Plant for fall: Aug 30 to Sep 20
Sow outdoors: Apr 14 to May 5Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 14 to Apr 28
Transplant outside: Apr 21 to May 12
Plant for fall: Oct 11 to Nov 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Griffin, IN
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 13 – Jan 27 | Mar 10 – Mar 24 | — | — |
| Peppers | Jan 27 – Feb 10 | Apr 21 – May 5 | — | — |
| Eggplant | Jan 27 – Feb 10 | Apr 21 – May 5 | — | — |
| Tomatoes | Feb 10 – Feb 24 | Apr 14 – Apr 28 | — | — |
| Lettuce | Feb 10 – Feb 24 | Mar 17 – Mar 31 | Mar 10 – Apr 14 | Aug 30 – Sep 27 |
| Kale | Feb 10 – Feb 24 | Mar 10 – Mar 24 | Mar 10 – Mar 24 | Aug 16 – Sep 6 |
| Broccoli | Feb 10 – Feb 24 | Mar 24 – Apr 7 | — | Jul 19 – Aug 9 |
| Cabbage | Feb 10 – Feb 24 | Mar 17 – Mar 31 | — | Jul 19 – Aug 9 |
| Cauliflower | Feb 10 – Feb 24 | Mar 24 – Apr 7 | — | Jul 19 – Aug 9 |
| Okra | Feb 24 – Mar 10 | Apr 28 – May 12 | Apr 28 – May 12 | — |
| Basil | Feb 24 – Mar 10 | Apr 14 – Apr 28 | — | — |
| Peas | — | — | Feb 24 – Mar 17 | Aug 2 – Aug 23 |
| Spinach | — | — | Feb 24 – Mar 17 | Aug 30 – Sep 20 |
| Radishes | — | — | Mar 3 – Apr 14 | Sep 13 – Oct 4 |
| Cucumbers | Mar 10 – Mar 17 | Apr 21 – Apr 28 | Apr 14 – Apr 28 | Aug 9 – Aug 23 |
| Zucchini & Summer Squash | Mar 10 – Mar 17 | — | Apr 14 – Apr 28 | Aug 16 – Aug 30 |
| Winter Squash & Pumpkins | Mar 10 – Mar 17 | — | Apr 14 – Apr 28 | — |
| Melons & Watermelon | Mar 10 – Mar 17 | Apr 21 – May 5 | — | — |
| Carrots | — | — | Mar 17 – Apr 14 | Aug 2 – Aug 16 |
| Beets | — | — | Mar 17 – Apr 14 | Aug 16 – Aug 30 |
| Potatoes | — | — | Mar 17 – Apr 7 | — |
| Swiss Chard | — | — | Mar 24 – Apr 21 | Aug 16 – Aug 30 |
| Cilantro | — | — | Mar 24 – Apr 14 | Aug 30 – Sep 20 |
| Green Beans | — | — | Apr 14 – May 5 | Aug 9 – Aug 23 |
| Sweet Corn | — | — | Apr 14 – Apr 28 | — |
| Sweet Potatoes | — | Apr 21 – May 12 | — | — |
| Garlic | — | — | — | Oct 11 – Nov 15 |
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 Grayville, IL weather station, 10 km away (elevation 436 ft (133 m)).
Frost dates near Griffin
- New Harmony Apr 7 · Oct 25
- Poseyville Apr 7 · Oct 25
- Cynthiana Apr 13 · Oct 25
- Owensville Apr 13 · Oct 25
- Wadesville Mar 29 · Nov 10
- Mount Vernon Apr 7 · Oct 28
- Haubstadt Apr 4 · Oct 29
- Fort Branch Apr 13 · Oct 25
- Inglefield Apr 4 · Oct 29
- Princeton Apr 13 · Oct 25
Frequently asked questions
When is the last frost in Griffin, IN?
The median last spring frost in Griffin, IN is April 7. There is still about a 10% chance of frost after April 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Griffin, IN?
The median first fall frost is October 25, with about a 10% chance of frost before October 12.
How long is the growing season in Griffin, IN?
About 201 days between the median last spring frost and first fall frost.
What planting zone is Griffin, IN?
Griffin, IN is in USDA hardiness zone 7a.