Rosenberg, TX planting zone & frost dates
Rosenberg is in USDA hardiness zone 9a. The last spring frost usually comes around February 9 and the first fall frost around December 13, for a growing season of about 305 days.
Planting calendar for Rosenberg
Dates are counted from the average last spring frost (February 9) 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 15 – Dec 29 Transplant outdoors: Feb 16 – Feb 23 |
| Peppers | Start seeds indoors: Dec 1 – Dec 15 Transplant outdoors: Feb 23 – Mar 2 |
| Eggplant | Start seeds indoors: Dec 1 – Dec 15 Transplant outdoors: Feb 23 – Mar 2 |
| Broccoli | Start seeds indoors: Dec 1 – Dec 15 Transplant outdoors: Jan 12 – Jan 26 |
| Cabbage | Start seeds indoors: Dec 1 – Dec 15 Transplant outdoors: Jan 12 – Jan 26 |
| Onions (sets) | Plant outdoors: Jan 12 – Jan 26 |
| Peas | Sow outdoors: Dec 29 – Jan 12 |
| Spinach | Sow outdoors: Dec 29 – Jan 12 |
| Lettuce | Sow outdoors: Jan 12 – Jan 26 |
| Carrots | Sow outdoors: Jan 12 – Jan 26 |
| Potatoes | Plant outdoors: Jan 12 – Jan 26 |
| Beans | Sow outdoors: Feb 16 – Feb 23 |
| Sweet corn | Sow outdoors: Feb 16 – Feb 23 |
| Cucumbers | Sow outdoors: Feb 16 – Feb 23 |
| Squash & zucchini | Sow outdoors: Feb 16 – Feb 23 |
| Basil | Start seeds indoors: Dec 29 – Jan 12 Transplant outdoors: Feb 16 – Feb 23 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Oct 18 (8 weeks before the average first fall frost on Dec 13).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Jan 13 | Feb 9 | Mar 11 |
| First 32°F frost in fall is before | Jan 13 | Dec 13 | Nov 19 |
How to read it: in spring there is a 10% chance of a frost after March 11, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 19. A hard freeze (28°F) usually ends around January 28.
Hardiness zone by ZIP code in Rosenberg
- 77471 zone 9a
Nearby cities
- Richmond zone 9b, last frost Feb 9
- Pecan Grove zone 9b, last frost Feb 9
- Greatwood zone 9b, last frost Feb 9
- New Territory zone 9b, last frost Feb 9
- Sugar Land zone 9b, last frost Feb 2
- Four Corners zone 9b, last frost Feb 2
- Cinco Ranch zone 9b, last frost Feb 2
- Mission Bend zone 9b, last frost Feb 2
Questions
What growing zone is Rosenberg, TX?
Rosenberg is in USDA Plant Hardiness Zone 9a (average extreme winter low 20°F to 25°F), according to the USDA 2023 map.
When is the last frost in Rosenberg?
The average last spring frost (32°F) in Rosenberg is February 9. There is still a 10% chance of frost until March 11.
When can I plant tomatoes in Rosenberg?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Feb 16 – Feb 23. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Sugar Land, TX (USC00418728), 16.4 km (10.2 mi) from the city center, elevation 26 m, based on 14 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.