Frost dates · USDA zone 10a
Frost dates for Westminster, CA
A 32 °F night is rare enough in Westminster, CA that NOAA can't put a date on it in a typical year. Here the calendar is set by summer heat, not frost.
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
NOAA flags SANTA ANA FIRE STN, CA as having too few 32 °F nights to compute freeze dates: in most years there isn't one. Tender crops can stay out all winter; the constraint is summer heat, which aborts pepper and tomato flowers.
Westminster planting calendar, 2027
No datable frost, so these rows use the Zone 10 schedule the Plan Builder runs for heat-limited gardens. 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 8 | Jan 3 | Apr 23 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Jan 31 | Mar 2 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Jan 17 | Jan 17 | Mar 3 | 45 from sow |
| Genovese BasilGenovese | Jan 3 | Feb 14 | Apr 15 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Dec 6 | Feb 7 | Apr 23 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Nov 22 | Feb 14 | May 20 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Dec 6 | Feb 7 | Apr 23 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Dec 6 | Feb 7 | Apr 28 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Dec 6 | Feb 7 | Apr 28 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Jan 17 | Jan 17 | Mar 28 | 70 from sow |
| TomatilloToma Verde | Dec 20 | Feb 7 | Apr 18 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Dec 20 | Feb 7 | Apr 23 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Dec 20 | Feb 7 | Apr 28 | 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 Westminster grow?
Each sauce, scheduled for a Westminster container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Westminster frost questions
How long is the growing season in Westminster, CA?
NOAA counts a full 365-day freeze-free season at SANTA ANA FIRE STN, CA in a typical year. What limits a sauce garden here is heat: peppers and tomatoes drop flowers in sustained hot nights, so plant to finish before peak summer or after it breaks.
What growing zone is Westminster, CA?
USDA hardiness zone 10a, per the 2023 USDA Plant Hardiness Zone Map for ZIP 92683. 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 Westminster, CA?
Start Roma VF (determinate paste) seeds indoors around Dec 20 and transplant around Feb 7, a date set from the zone 10 planning average, since this station has no median frost date to count from. First ripe fruit lands around Apr 23.
When should I plant peppers in Westminster, CA?
Sow jalapeño indoors on a heat mat around Dec 6; transplant no earlier than Feb 7, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Apr 23.
Nearby in California
- Garden Grovefrost rare
- Stantonfrost rare
- Fountain Valleyfrost rare
- Huntington Beachfrost rare
- Cypressfrost rare
- Santa Anafrost rare
All California frost dates → · How frost-date math drives a sowing calendar →