Frost dates · USDA zone 9a
Frost dates for Rosenberg, TX
Rosenberg, TX sees its last 32 °F night of spring around February 9 and its first of fall around December 13 — a 305-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Jan 13 | Jan 13 (next year) |
| Median — 1 year in 2 | Feb 9 | Dec 13 |
| 1 year in 10 | Mar 11 | Nov 19 |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 305 days median, at least 269 in 9 years of 10, at least 340 days in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Jan 28 and first of Jan 1 (next year).
Rosenberg planting calendar, 2027
Every row runs from the median last frost (Feb 9) and median first frost (Dec 13) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Nov 17 | Jan 12 | May 2 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Feb 9 | Mar 11 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Jan 26 | Jan 26 | Mar 12 | 45 from sow |
| Genovese BasilGenovese | Jan 12 | Feb 23 | Apr 24 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Dec 15 | Feb 16 | May 2 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Dec 1 | Feb 23 | May 29 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Dec 15 | Feb 16 | May 2 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Dec 15 | Feb 16 | May 7 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Dec 15 | Feb 16 | May 7 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Jan 26 | Jan 26 | Apr 6 | 70 from sow |
| TomatilloToma Verde | Dec 29 | Feb 16 | Apr 27 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Dec 29 | Feb 16 | May 2 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Dec 29 | Feb 16 | May 7 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Rosenberg grow?
Each sauce, scheduled for a Rosenberg container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Rosenberg frost questions
When is the last frost in Rosenberg, TX?
The median last 32 °F freeze at SUGAR LAND, TX is February 9: half of years see a later one. One year in ten, a freeze still comes after March 11; nine years in ten, it comes after January 13. Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Rosenberg, TX?
The median first 32 °F freeze of fall is December 13. One year in ten it arrives before November 19; nine years in ten, before January 13 (next year).
How long is the growing season in Rosenberg, TX?
305 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 269 days; one year in ten, at least 340 days.
What growing zone is Rosenberg, TX?
USDA hardiness zone 9a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 77471. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Rosenberg, TX?
Start Roma VF (determinate paste) seeds indoors around Dec 29 and transplant around Feb 16, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Mar 11. First ripe fruit lands around May 2.
When should I plant peppers in Rosenberg, TX?
Sow jalapeño indoors on a heat mat around Dec 15; transplant no earlier than Feb 16, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around May 2.
Nearby in Texas
- Fulshearlast frost Feb 28
- Sugar Landlast frost Feb 9
- Missouri Citylast frost Feb 15
- Pearlandlast frost Jan 31
- Houstonlast frost Feb 2
- Friendswoodlast frost Jan 31
All Texas frost dates → · How frost-date math drives a sowing calendar →