Spring, TX planting zone & frost dates
Spring is in USDA hardiness zone 9b. The last spring frost usually comes around February 13 and the first fall frost around December 9, for a growing season of about 300 days.
Planting calendar for Spring
Dates are counted from the average last spring frost (February 13) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Dec 19 – Jan 2 Transplant outdoors: Feb 20 – Feb 27 |
| Peppers | Start seeds indoors: Dec 5 – Dec 19 Transplant outdoors: Feb 27 – Mar 6 |
| Eggplant | Start seeds indoors: Dec 5 – Dec 19 Transplant outdoors: Feb 27 – Mar 6 |
| Broccoli | Start seeds indoors: Dec 5 – Dec 19 Transplant outdoors: Jan 16 – Jan 30 |
| Cabbage | Start seeds indoors: Dec 5 – Dec 19 Transplant outdoors: Jan 16 – Jan 30 |
| Onions (sets) | Plant outdoors: Jan 16 – Jan 30 |
| Peas | Sow outdoors: Jan 2 – Jan 16 |
| Spinach | Sow outdoors: Jan 2 – Jan 16 |
| Lettuce | Sow outdoors: Jan 16 – Jan 30 |
| Carrots | Sow outdoors: Jan 16 – Jan 30 |
| Potatoes | Plant outdoors: Jan 16 – Jan 30 |
| Beans | Sow outdoors: Feb 20 – Feb 27 |
| Sweet corn | Sow outdoors: Feb 20 – Feb 27 |
| Cucumbers | Sow outdoors: Feb 20 – Feb 27 |
| Squash & zucchini | Sow outdoors: Feb 20 – Feb 27 |
| Basil | Start seeds indoors: Jan 2 – Jan 16 Transplant outdoors: Feb 20 – Feb 27 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 14 (8 weeks before the average first fall frost on Dec 9).
Useful for zone 9b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Shade cloth — for hot summers
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Jan 12 | Feb 13 | Mar 12 |
| First 32°F frost in fall is before | Jan 11 | Dec 9 | Nov 17 |
How to read it: in spring there is a 10% chance of a frost after March 12, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 17. A hard freeze (28°F) usually ends around January 27.
Hardiness zone by ZIP code in Spring
- 77373 zone 9b
- 77379 zone 9b
- 77380 zone 9b
- 77381 zone 9a
- 77382 zone 9a
- 77383 zone 9b
- 77386 zone 9b
- 77387 zone 9a
- 77388 zone 9b
- 77389 zone 9b
- 77391 zone 9b
- 77393 zone 9a
Nearby cities
- The Woodlands zone 9a, last frost Feb 19
- Humble zone 9b, last frost Feb 13
- Tomball zone 9b, last frost Feb 19
- New Caney zone 9a, last frost Feb 13
- Conroe zone 9a, last frost Feb 24
- Cypress zone 9b, last frost Feb 19
- Houston zone 9b, last frost Feb 2
- Channelview zone 9b, last frost Feb 2
Questions
What growing zone is Spring, TX?
Spring is in USDA Plant Hardiness Zone 9b (average extreme winter low 25°F to 30°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 9a.
When is the last frost in Spring?
The average last spring frost (32°F) in Spring is February 13. There is still a 10% chance of frost until March 12.
When can I plant tomatoes in Spring?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Feb 20 – Feb 27. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Houston Intercont Ap, TX (USW00012960), 12.4 km (7.7 mi) from the city center, elevation 29 m, based on 25 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.