Knickerbocker, TX frost dates
Last spring frostMar 22median date
First fall frostNov 10median date
Growing season233 daysfrost-free
Hardiness zone8aZone 8a
How Knickerbocker compares
- In 8 years out of 10, the last spring frost in Knickerbocker falls between March 3 and April 10, a 38-day window. The first fall frost falls between October 28 and November 28.
- The median last frost is 7 days later than the Texas median of Mar 15.
- Its 233-day growing season is longer than 29% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is 7 days earlier than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 60 nights a year at or below 32°F.
- Compared with San Angelo, TX, 27 km away, the last frost here is 2 days later than there and the growing season is 2 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 3 |
| 50% (median) | March 22 |
| 10% (safe for tender plants) | April 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 28 |
| 50% (median) | November 10 |
| 90% (late) | November 28 |
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 Knickerbocker, TX
Knickerbocker, TX frost dates — last frost Mar 22, first frost Nov 10, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 28 to Jan 11Start indoors: Dec 28 to Jan 11Transplant outside: Feb 22 to Mar 8
Start indoors: Jan 11 to Jan 25Transplant outside: Apr 5 to Apr 19
Start indoors: Jan 11 to Jan 25Transplant outside: Apr 5 to Apr 19
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 29 to Apr 12
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 1 to Mar 15Sow outdoors: Feb 22 to Mar 29Plant for fall: Sep 15 to Oct 13
Start indoors: Jan 25 to Feb 8Transplant outside: Feb 22 to Mar 8Sow outdoors: Feb 22 to Mar 8Plant for fall: Sep 1 to Sep 22
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 8 to Mar 22Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 1 to Mar 15Plant for fall: Aug 4 to Aug 25
Start indoors: Jan 25 to Feb 8Transplant outside: Mar 8 to Mar 22Plant for fall: Aug 4 to Aug 25
Start indoors: Feb 8 to Feb 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 12 to Apr 26
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 29 to Apr 12
Sow outdoors: Feb 8 to Mar 1Plant for fall: Aug 18 to Sep 8
Sow outdoors: Feb 8 to Mar 1Plant for fall: Sep 15 to Oct 6
Sow outdoors: Feb 15 to Mar 29Plant for fall: Sep 29 to Oct 20
Start indoors: Feb 22 to Mar 1Transplant outside: Apr 5 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 25 to Sep 8
Start indoors: Feb 22 to Mar 1Sow outdoors: Mar 29 to Apr 12Plant for fall: Sep 1 to Sep 15
Start indoors: Feb 22 to Mar 1Sow outdoors: Mar 29 to Apr 12
Start indoors: Feb 22 to Mar 1Transplant outside: Apr 5 to Apr 19
Sow outdoors: Mar 1 to Mar 29Plant for fall: Aug 18 to Sep 1
Sow outdoors: Mar 1 to Mar 29Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 1 to Mar 22
Sow outdoors: Mar 8 to Apr 5Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 8 to Mar 29Plant for fall: Sep 15 to Oct 6
Sow outdoors: Mar 29 to Apr 19Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 29 to Apr 12
Transplant outside: Apr 5 to Apr 26
Plant for fall: Oct 27 to Dec 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Knickerbocker, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 28 – Jan 11 | Feb 22 – Mar 8 | — | — |
| Peppers | Jan 11 – Jan 25 | Apr 5 – Apr 19 | — | — |
| Eggplant | Jan 11 – Jan 25 | Apr 5 – Apr 19 | — | — |
| Tomatoes | Jan 25 – Feb 8 | Mar 29 – Apr 12 | — | — |
| Lettuce | Jan 25 – Feb 8 | Mar 1 – Mar 15 | Feb 22 – Mar 29 | Sep 15 – Oct 13 |
| Kale | Jan 25 – Feb 8 | Feb 22 – Mar 8 | Feb 22 – Mar 8 | Sep 1 – Sep 22 |
| Broccoli | Jan 25 – Feb 8 | Mar 8 – Mar 22 | — | Aug 4 – Aug 25 |
| Cabbage | Jan 25 – Feb 8 | Mar 1 – Mar 15 | — | Aug 4 – Aug 25 |
| Cauliflower | Jan 25 – Feb 8 | Mar 8 – Mar 22 | — | Aug 4 – Aug 25 |
| Okra | Feb 8 – Feb 22 | Apr 12 – Apr 26 | Apr 12 – Apr 26 | — |
| Basil | Feb 8 – Feb 22 | Mar 29 – Apr 12 | — | — |
| Peas | — | — | Feb 8 – Mar 1 | Aug 18 – Sep 8 |
| Spinach | — | — | Feb 8 – Mar 1 | Sep 15 – Oct 6 |
| Radishes | — | — | Feb 15 – Mar 29 | Sep 29 – Oct 20 |
| Cucumbers | Feb 22 – Mar 1 | Apr 5 – Apr 12 | Mar 29 – Apr 12 | Aug 25 – Sep 8 |
| Zucchini & Summer Squash | Feb 22 – Mar 1 | — | Mar 29 – Apr 12 | Sep 1 – Sep 15 |
| Winter Squash & Pumpkins | Feb 22 – Mar 1 | — | Mar 29 – Apr 12 | — |
| Melons & Watermelon | Feb 22 – Mar 1 | Apr 5 – Apr 19 | — | — |
| Carrots | — | — | Mar 1 – Mar 29 | Aug 18 – Sep 1 |
| Beets | — | — | Mar 1 – Mar 29 | Sep 1 – Sep 15 |
| Potatoes | — | — | Mar 1 – Mar 22 | — |
| Swiss Chard | — | — | Mar 8 – Apr 5 | Sep 1 – Sep 15 |
| Cilantro | — | — | Mar 8 – Mar 29 | Sep 15 – Oct 6 |
| Green Beans | — | — | Mar 29 – Apr 19 | Aug 25 – Sep 8 |
| Sweet Corn | — | — | Mar 29 – Apr 12 | — |
| Sweet Potatoes | — | Apr 5 – Apr 26 | — | — |
| Garlic | — | — | — | Oct 27 – Dec 1 |
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 San Angelo Wfo, TX weather station, 16 km away (elevation 1,890 ft (576 m)).
Frost dates near Knickerbocker
- Christoval Mar 22 · Nov 10
- Mertzon Apr 1 · Nov 4
- Goodfellow Afb Mar 20 · Nov 10
- San Angelo Mar 20 · Nov 10
- Wall Mar 20 · Nov 10
- Veribest Mar 20 · Nov 10
- Carlsbad Apr 6 · Nov 2
- Eldorado Mar 22 · Nov 10
- Vancourt Apr 5 · Nov 4
- Water Valley Apr 6 · Nov 2
Frequently asked questions
When is the last frost in Knickerbocker, TX?
The median last spring frost in Knickerbocker, TX is March 22. There is still about a 10% chance of frost after April 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Knickerbocker, TX?
The median first fall frost is November 10, with about a 10% chance of frost before October 28.
How long is the growing season in Knickerbocker, TX?
About 233 days between the median last spring frost and first fall frost.
What planting zone is Knickerbocker, TX?
Knickerbocker, TX is in USDA hardiness zone 8a.