Frost dates for 78155 — Seguin, TX
Last spring frostMar 1median date
First fall frostNov 26median date
Growing season270 daysfrost-free
Hardiness zone9aZone 9a
How Seguin compares
- In 8 years out of 10, the last spring frost in Seguin falls between February 3 and March 20, a 45-day window. The first fall frost falls between November 8 and December 20.
- The median last frost is 14 days earlier than the Texas median of Mar 15.
- Its 270-day growing season is longer than 81% of the 1,316 Texas places with a regular frost season (state median 245 days).
- The last frost is typical for zone 9a, where the median is Mar 3.
- The weather station records an average of 20 nights a year at or below 32°F.
- Compared with New Braunfels, TX, 24 km away, the last frost here is 7 days earlier than there and the growing season is 15 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 3 |
| 50% (median) | March 1 |
| 10% (safe for tender plants) | March 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 8 |
| 50% (median) | November 26 |
| 90% (late) | December 20 |
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 Seguin, TX
Frost dates for 78155 — Seguin, TX — last frost Mar 1, first frost Nov 26, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 7 to Dec 21Transplant outside: Feb 1 to Feb 15
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Mar 15 to Mar 29
Start indoors: Dec 21 to Jan 4Start indoors: Dec 21 to Jan 4Transplant outside: Mar 15 to Mar 29
Start indoors: Jan 4 to Jan 18Transplant outside: Mar 8 to Mar 22
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 8 to Feb 22Sow outdoors: Feb 1 to Mar 8Plant for fall: Oct 1 to Oct 29
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 1 to Feb 15Sow outdoors: Feb 1 to Feb 15Plant for fall: Sep 17 to Oct 8
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 15 to Mar 1Plant for fall: Aug 20 to Sep 10
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 8 to Feb 22Plant for fall: Aug 20 to Sep 10
Start indoors: Jan 4 to Jan 18Transplant outside: Feb 15 to Mar 1Plant for fall: Aug 20 to Sep 10
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 22 to Apr 5
Start indoors: Jan 18 to Feb 1Transplant outside: Mar 8 to Mar 22
Sow outdoors: Jan 18 to Feb 8Plant for fall: Sep 3 to Sep 24
Sow outdoors: Jan 18 to Feb 8Plant for fall: Oct 1 to Oct 22
Sow outdoors: Jan 25 to Mar 8Plant for fall: Oct 15 to Nov 5
Start indoors: Feb 1 to Feb 8Transplant outside: Mar 15 to Mar 22Sow outdoors: Mar 8 to Mar 22Plant for fall: Sep 10 to Sep 24
Start indoors: Feb 1 to Feb 8Sow outdoors: Mar 8 to Mar 22Plant for fall: Sep 17 to Oct 1
Start indoors: Feb 1 to Feb 8Sow outdoors: Mar 8 to Mar 22
Start indoors: Feb 1 to Feb 8Transplant outside: Mar 15 to Mar 29
Sow outdoors: Feb 8 to Mar 8Plant for fall: Sep 3 to Sep 17
Sow outdoors: Feb 8 to Mar 8Plant for fall: Sep 17 to Oct 1
Sow outdoors: Feb 8 to Mar 1
Sow outdoors: Feb 15 to Mar 15Plant for fall: Sep 17 to Oct 1
Sow outdoors: Feb 15 to Mar 8Plant for fall: Oct 1 to Oct 22
Sow outdoors: Mar 8 to Mar 29Plant for fall: Sep 10 to Sep 24
Sow outdoors: Mar 8 to Mar 22
Transplant outside: Mar 15 to Apr 5
Plant for fall: Nov 12 to Dec 17
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Seguin, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 7 – Dec 21 | Feb 1 – Feb 15 | — | — |
| Peppers | Dec 21 – Jan 4 | Mar 15 – Mar 29 | — | — |
| Eggplant | Dec 21 – Jan 4 | Mar 15 – Mar 29 | — | — |
| Tomatoes | Jan 4 – Jan 18 | Mar 8 – Mar 22 | — | — |
| Lettuce | Jan 4 – Jan 18 | Feb 8 – Feb 22 | Feb 1 – Mar 8 | Oct 1 – Oct 29 |
| Kale | Jan 4 – Jan 18 | Feb 1 – Feb 15 | Feb 1 – Feb 15 | Sep 17 – Oct 8 |
| Broccoli | Jan 4 – Jan 18 | Feb 15 – Mar 1 | — | Aug 20 – Sep 10 |
| Cabbage | Jan 4 – Jan 18 | Feb 8 – Feb 22 | — | Aug 20 – Sep 10 |
| Cauliflower | Jan 4 – Jan 18 | Feb 15 – Mar 1 | — | Aug 20 – Sep 10 |
| Okra | Jan 18 – Feb 1 | Mar 22 – Apr 5 | Mar 22 – Apr 5 | — |
| Basil | Jan 18 – Feb 1 | Mar 8 – Mar 22 | — | — |
| Peas | — | — | Jan 18 – Feb 8 | Sep 3 – Sep 24 |
| Spinach | — | — | Jan 18 – Feb 8 | Oct 1 – Oct 22 |
| Radishes | — | — | Jan 25 – Mar 8 | Oct 15 – Nov 5 |
| Cucumbers | Feb 1 – Feb 8 | Mar 15 – Mar 22 | Mar 8 – Mar 22 | Sep 10 – Sep 24 |
| Zucchini & Summer Squash | Feb 1 – Feb 8 | — | Mar 8 – Mar 22 | Sep 17 – Oct 1 |
| Winter Squash & Pumpkins | Feb 1 – Feb 8 | — | Mar 8 – Mar 22 | — |
| Melons & Watermelon | Feb 1 – Feb 8 | Mar 15 – Mar 29 | — | — |
| Carrots | — | — | Feb 8 – Mar 8 | Sep 3 – Sep 17 |
| Beets | — | — | Feb 8 – Mar 8 | Sep 17 – Oct 1 |
| Potatoes | — | — | Feb 8 – Mar 1 | — |
| Swiss Chard | — | — | Feb 15 – Mar 15 | Sep 17 – Oct 1 |
| Cilantro | — | — | Feb 15 – Mar 8 | Oct 1 – Oct 22 |
| Green Beans | — | — | Mar 8 – Mar 29 | Sep 10 – Sep 24 |
| Sweet Corn | — | — | Mar 8 – Mar 22 | — |
| Sweet Potatoes | — | Mar 15 – Apr 5 | — | — |
| Garlic | — | — | — | Nov 12 – Dec 17 |
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 Austin San Antonio, TX weather station, 17 km away (elevation 633 ft (193 m)).
ZIP codes in Seguin: 78155 78156
Frost dates near Seguin
- Geronimo Mar 8 · Nov 18
- Mc Queeney Mar 1 · Nov 26
- Kingsbury Mar 5 · Nov 23
- Marion Mar 8 · Nov 18
- Jbsa Randolph Mar 7 · Nov 22
- New Braunfels Mar 8 · Nov 18
- Cibolo Feb 21 · Dec 5
- Saint Hedwig Feb 21 · Dec 5
Frequently asked questions
When is the last frost in Seguin, TX?
The median last spring frost in Seguin, TX is March 1. There is still about a 10% chance of frost after March 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Seguin, TX?
The median first fall frost is November 26, with about a 10% chance of frost before November 8.
How long is the growing season in Seguin, TX?
About 270 days between the median last spring frost and first fall frost.
What planting zone is Seguin, TX?
Seguin, TX is in USDA hardiness zone 9a.