Callahan, FL frost dates
Last spring frostFeb 25median date
First fall frostDec 7median date
Growing season285 daysfrost-free
Hardiness zone9aZone 9a
How Callahan compares
- In 8 years out of 10, the last spring frost in Callahan falls between January 22 and March 19, a 56-day window. The first fall frost falls between November 17 and January 10.
- The median last frost is 6 days earlier than the Florida median of Mar 3.
- Its 285-day growing season is longer than 86% of the 174 Florida places with a regular frost season (state median 273 days).
- The last frost is 6 days earlier than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 14 nights a year at or below 32°F.
- Nearby Jacksonville, FL, 30 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 22 |
| 50% (median) | February 25 |
| 10% (safe for tender plants) | March 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 17 |
| 50% (median) | December 7 |
| 90% (late) | January 10 |
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 Callahan, FL
Callahan, FL frost dates — last frost Feb 25, first frost Dec 7, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 3 to Dec 17Transplant outside: Jan 28 to Feb 11
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 17 to Dec 31Transplant outside: Mar 11 to Mar 25
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Sow outdoors: Jan 28 to Mar 4Plant for fall: Oct 12 to Nov 9
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Jan 28 to Feb 11Sow outdoors: Jan 28 to Feb 11Plant for fall: Sep 28 to Oct 19
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 31 to Sep 21
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 31 to Sep 21
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 31 to Sep 21
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 18 to Apr 1
Start indoors: Jan 14 to Jan 28Transplant outside: Mar 4 to Mar 18
Sow outdoors: Jan 14 to Feb 4Plant for fall: Sep 14 to Oct 5
Sow outdoors: Jan 14 to Feb 4Plant for fall: Oct 12 to Nov 2
Sow outdoors: Jan 21 to Mar 4Plant for fall: Oct 26 to Nov 16
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 18Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 21 to Oct 5
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18Plant for fall: Sep 28 to Oct 12
Start indoors: Jan 28 to Feb 4Sow outdoors: Mar 4 to Mar 18
Start indoors: Jan 28 to Feb 4Transplant outside: Mar 11 to Mar 25
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 28 to Oct 12
Sow outdoors: Feb 4 to Feb 25
Sow outdoors: Feb 11 to Mar 11Plant for fall: Sep 28 to Oct 12
Sow outdoors: Feb 11 to Mar 4Plant for fall: Oct 12 to Nov 2
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 21 to Oct 5
Sow outdoors: Mar 4 to Mar 18
Transplant outside: Mar 11 to Apr 1
Plant for fall: Nov 23 to Dec 28
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Callahan, FL
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 3 – Dec 17 | Jan 28 – Feb 11 | — | — |
| Peppers | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Eggplant | Dec 17 – Dec 31 | Mar 11 – Mar 25 | — | — |
| Tomatoes | Dec 31 – Jan 14 | Mar 4 – Mar 18 | — | — |
| Lettuce | Dec 31 – Jan 14 | Feb 4 – Feb 18 | Jan 28 – Mar 4 | Oct 12 – Nov 9 |
| Kale | Dec 31 – Jan 14 | Jan 28 – Feb 11 | Jan 28 – Feb 11 | Sep 28 – Oct 19 |
| Broccoli | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 31 – Sep 21 |
| Cabbage | Dec 31 – Jan 14 | Feb 4 – Feb 18 | — | Aug 31 – Sep 21 |
| Cauliflower | Dec 31 – Jan 14 | Feb 11 – Feb 25 | — | Aug 31 – Sep 21 |
| Okra | Jan 14 – Jan 28 | Mar 18 – Apr 1 | Mar 18 – Apr 1 | — |
| Basil | Jan 14 – Jan 28 | Mar 4 – Mar 18 | — | — |
| Peas | — | — | Jan 14 – Feb 4 | Sep 14 – Oct 5 |
| Spinach | — | — | Jan 14 – Feb 4 | Oct 12 – Nov 2 |
| Radishes | — | — | Jan 21 – Mar 4 | Oct 26 – Nov 16 |
| Cucumbers | Jan 28 – Feb 4 | Mar 11 – Mar 18 | Mar 4 – Mar 18 | Sep 21 – Oct 5 |
| Zucchini & Summer Squash | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | Sep 28 – Oct 12 |
| Winter Squash & Pumpkins | Jan 28 – Feb 4 | — | Mar 4 – Mar 18 | — |
| Melons & Watermelon | Jan 28 – Feb 4 | Mar 11 – Mar 25 | — | — |
| Carrots | — | — | Feb 4 – Mar 4 | Sep 14 – Sep 28 |
| Beets | — | — | Feb 4 – Mar 4 | Sep 28 – Oct 12 |
| Potatoes | — | — | Feb 4 – Feb 25 | — |
| Swiss Chard | — | — | Feb 11 – Mar 11 | Sep 28 – Oct 12 |
| Cilantro | — | — | Feb 11 – Mar 4 | Oct 12 – Nov 2 |
| Green Beans | — | — | Mar 4 – Mar 25 | Sep 21 – Oct 5 |
| Sweet Corn | — | — | Mar 4 – Mar 18 | — |
| Sweet Potatoes | — | Mar 11 – Apr 1 | — | — |
| Garlic | — | — | — | Nov 23 – Dec 28 |
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 Jacksonville, FL weather station, 13 km away (elevation 33 ft (10 m)).
Frost dates near Callahan
- Hilliard Feb 26 · Dec 7
- Bryceville Feb 28 · Dec 3
- Yulee Feb 2 · Jan 4
- Jacksonville Feb 1 · Jan 5
- Fernandina Beach Feb 2 · Jan 4
- Macclenny Mar 8 · Dec 1
- Atlantic Beach Feb 1 · Jan 5
- Orange Park Feb 1 · Jan 5
- Neptune Beach Jan 31 · Jan 10
- Glen Saint Mary Mar 8 · Dec 1
Frequently asked questions
When is the last frost in Callahan, FL?
The median last spring frost in Callahan, FL is February 25. There is still about a 10% chance of frost after March 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Callahan, FL?
The median first fall frost is December 7, with about a 10% chance of frost before November 17.
How long is the growing season in Callahan, FL?
About 285 days between the median last spring frost and first fall frost.
What planting zone is Callahan, FL?
Callahan, FL is in USDA hardiness zone 9a.