Herndon, KY frost dates
Last spring frostApr 4median date
First fall frostNov 2median date
Growing season212 daysfrost-free
Hardiness zone7aZone 7a
How Herndon compares
- In 8 years out of 10, the last spring frost in Herndon falls between March 18 and April 19, a 32-day window. The first fall frost falls between October 20 and November 18.
- The median last frost is 12 days earlier than the Kentucky median of Apr 16.
- Its 212-day growing season is longer than 93% of the 785 Kentucky places with a regular frost season (state median 192 days).
- The last frost is 12 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 87 nights a year at or below 32°F.
- Compared with Clarksville, TN, 30 km away, the last frost here is 1 day later than there and the growing season is the same length.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 18 |
| 50% (median) | April 4 |
| 10% (safe for tender plants) | April 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 20 |
| 50% (median) | November 2 |
| 90% (late) | November 18 |
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 Herndon, KY
Herndon, KY frost dates — last frost Apr 4, first frost Nov 2, zone 7a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Jan 10 to Jan 24Transplant outside: Mar 7 to Mar 21
Start indoors: Jan 24 to Feb 7Transplant outside: Apr 18 to May 2
Start indoors: Jan 24 to Feb 7Transplant outside: Apr 18 to May 2
Start indoors: Feb 7 to Feb 21Transplant outside: Apr 11 to Apr 25
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 14 to Mar 28Sow outdoors: Mar 7 to Apr 11Plant for fall: Sep 7 to Oct 5
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 7 to Mar 21Sow outdoors: Mar 7 to Mar 21Plant for fall: Aug 24 to Sep 14
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 21 to Apr 4Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 14 to Mar 28Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 21 to Apr 4Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 11 to Apr 25
Sow outdoors: Feb 21 to Mar 14Plant for fall: Aug 10 to Aug 31
Sow outdoors: Feb 21 to Mar 14Plant for fall: Sep 7 to Sep 28
Sow outdoors: Feb 28 to Apr 11Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 7 to Mar 14Transplant outside: Apr 18 to Apr 25Sow outdoors: Apr 11 to Apr 25Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 7 to Mar 14Sow outdoors: Apr 11 to Apr 25Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 7 to Mar 14Sow outdoors: Apr 11 to Apr 25
Start indoors: Mar 7 to Mar 14Transplant outside: Apr 18 to May 2
Sow outdoors: Mar 14 to Apr 11Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 14 to Apr 11Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 14 to Apr 4
Sow outdoors: Mar 21 to Apr 18Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 21 to Apr 11Plant for fall: Sep 7 to Sep 28
Sow outdoors: Apr 11 to May 2Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 11 to Apr 25
Transplant outside: Apr 18 to May 9
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Herndon, KY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 10 – Jan 24 | Mar 7 – Mar 21 | — | — |
| Peppers | Jan 24 – Feb 7 | Apr 18 – May 2 | — | — |
| Eggplant | Jan 24 – Feb 7 | Apr 18 – May 2 | — | — |
| Tomatoes | Feb 7 – Feb 21 | Apr 11 – Apr 25 | — | — |
| Lettuce | Feb 7 – Feb 21 | Mar 14 – Mar 28 | Mar 7 – Apr 11 | Sep 7 – Oct 5 |
| Kale | Feb 7 – Feb 21 | Mar 7 – Mar 21 | Mar 7 – Mar 21 | Aug 24 – Sep 14 |
| Broccoli | Feb 7 – Feb 21 | Mar 21 – Apr 4 | — | Jul 27 – Aug 17 |
| Cabbage | Feb 7 – Feb 21 | Mar 14 – Mar 28 | — | Jul 27 – Aug 17 |
| Cauliflower | Feb 7 – Feb 21 | Mar 21 – Apr 4 | — | Jul 27 – Aug 17 |
| Okra | Feb 21 – Mar 7 | Apr 25 – May 9 | Apr 25 – May 9 | — |
| Basil | Feb 21 – Mar 7 | Apr 11 – Apr 25 | — | — |
| Peas | — | — | Feb 21 – Mar 14 | Aug 10 – Aug 31 |
| Spinach | — | — | Feb 21 – Mar 14 | Sep 7 – Sep 28 |
| Radishes | — | — | Feb 28 – Apr 11 | Sep 21 – Oct 12 |
| Cucumbers | Mar 7 – Mar 14 | Apr 18 – Apr 25 | Apr 11 – Apr 25 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 7 – Mar 14 | — | Apr 11 – Apr 25 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 7 – Mar 14 | — | Apr 11 – Apr 25 | — |
| Melons & Watermelon | Mar 7 – Mar 14 | Apr 18 – May 2 | — | — |
| Carrots | — | — | Mar 14 – Apr 11 | Aug 10 – Aug 24 |
| Beets | — | — | Mar 14 – Apr 11 | Aug 24 – Sep 7 |
| Potatoes | — | — | Mar 14 – Apr 4 | — |
| Swiss Chard | — | — | Mar 21 – Apr 18 | Aug 24 – Sep 7 |
| Cilantro | — | — | Mar 21 – Apr 11 | Sep 7 – Sep 28 |
| Green Beans | — | — | Apr 11 – May 2 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 11 – Apr 25 | — |
| Sweet Potatoes | — | Apr 18 – May 9 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
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 Hopkinsville, KY weather station, 17 km away (elevation 522 ft (159 m)).
Frost dates near Herndon
- La Fayette Apr 6 · Oct 28
- Fort Campbell Apr 6 · Oct 28
- Gracey Apr 4 · Nov 2
- Oak Grove Apr 6 · Oct 28
- Hopkinsville Apr 4 · Nov 2
- Cadiz Apr 4 · Nov 2
- Pembroke Apr 4 · Nov 2
- Cerulean Apr 4 · Nov 2
- Fairview Apr 3 · Oct 29
- Trenton Apr 3 · Oct 29
Frequently asked questions
When is the last frost in Herndon, KY?
The median last spring frost in Herndon, KY is April 4. There is still about a 10% chance of frost after April 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Herndon, KY?
The median first fall frost is November 2, with about a 10% chance of frost before October 20.
How long is the growing season in Herndon, KY?
About 212 days between the median last spring frost and first fall frost.
What planting zone is Herndon, KY?
Herndon, KY is in USDA hardiness zone 7a.