Vista, California: planting zone & frost dates
Vista is in USDA plant hardiness zone 10a, where the average coldest winter night reaches 30 to 35°F (-1.1 to 1.7°C). The typical last spring frost is around Feb 24 and the first fall frost around Dec 24.
Frost dates
| Probability | Last spring frost (32°F) | First fall frost (32°F) |
|---|---|---|
| Safer (10% risk) | Mar 16 | Dec 14 |
| Typical planning date (30% risk) | Feb 24 | Dec 24 |
| Median (50%) | Jan 30 | Jan 7 |
How to read this: after the spring "10% risk" date, a 32°F frost happens in only about 1 year in 10. In fall, the "10% risk" date is the early end — a frost before it happens about 1 year in 10.
Frost data comes from NOAA station VISTA, CA (USC00049378), 3.2 mi (5.1 km) from the city center and 16 ft lower than the city center (-5 m). Record used for the 1991–2020 normals: 22 years.
Why your yard may differ from the station: microclimates.
Hardiness zone across Vista
All 3 ZIP codes covering Vista are in zone 10a.
Vegetable planting calendar for Vista
Dates are counted from the 30%-risk frost dates above (last frost Feb 24, first frost Dec 24). Shift a week later in cold spots or low-lying ground.
| Crop | Start indoors | Transplant / plant out | Direct sow | Fall crop sow/plant |
|---|---|---|---|---|
| Tomato | Dec 30 – Jan 13 | Mar 3 – Mar 17 | — | — |
| Pepper | Dec 16 – Dec 30 | Mar 10 – Mar 24 | — | — |
| Lettuce Mild winters: fall and winter plantings are usually more reliable than spring. | Jan 13 – Jan 27 | Feb 10 – Mar 3 | Jan 27 – Mar 10 | Oct 15 – Nov 12 |
| Green Beans | — | — | Mar 3 – Apr 7 | Oct 1 – Oct 15 |
| Sweet Corn | — | — | Mar 3 – Mar 31 | — |
| Zucchini & Summer Squash | Jan 27 – Feb 3 | Mar 3 – Mar 17 | Mar 3 – Mar 24 | Oct 1 – Oct 15 |
| Cucumber | Jan 27 – Feb 3 | Mar 10 – Mar 17 | Mar 3 – Mar 24 | Oct 1 – Oct 15 |
| Carrot Mild winters: fall and winter plantings are usually more reliable than spring. | — | — | Feb 3 – Mar 10 | Oct 1 – Oct 15 |
| Onion Mild winters: fall and winter plantings are usually more reliable than spring. | Dec 2 – Dec 16 | Jan 27 – Feb 10 | — | — |
| Potato Mild winters: fall and winter plantings are usually more reliable than spring. | — | Jan 27 – Feb 17 | — | — |
| Basil | Jan 13 – Jan 27 | Mar 10 – Mar 24 | Mar 10 – Mar 31 | — |
| Spinach Mild winters: fall and winter plantings are usually more reliable than spring. | — | — | Jan 13 – Feb 10 | Oct 29 – Nov 26 |
| Kale Mild winters: fall and winter plantings are usually more reliable than spring. | Dec 30 – Jan 13 | Jan 27 – Feb 17 | Jan 27 – Feb 17 | Oct 15 – Nov 12 |
| Broccoli Mild winters: fall and winter plantings are usually more reliable than spring. | Dec 30 – Jan 13 | Feb 10 – Mar 3 | — | Oct 1 – Oct 15 |
| Peas Mild winters: fall and winter plantings are usually more reliable than spring. | — | — | Jan 13 – Feb 3 | Oct 15 – Oct 29 |
| Eggplant | Dec 16 – Dec 30 | Mar 10 – Mar 24 | — | — |
| Cabbage Mild winters: fall and winter plantings are usually more reliable than spring. | Dec 30 – Jan 13 | Jan 27 – Feb 10 | — | Oct 1 – Oct 15 |
| Radish Mild winters: fall and winter plantings are usually more reliable than spring. | — | — | Jan 20 – Mar 10 | Nov 12 – Dec 10 |
| Strawberry | — | Jan 27 – Feb 17 | — | — |
| Beets Mild winters: fall and winter plantings are usually more reliable than spring. | — | — | Feb 3 – Mar 17 | Oct 15 – Oct 29 |
Nearby cities in California
- Carlsbad — zone 10a, frost rare
- Oceanside — zone 10a, last frost Feb 4, first frost Dec 1
- San Marcos — zone 10a, last frost Jan 14, first frost Dec 23
- Escondido — zone 10a, last frost Jan 14, first frost Dec 23
- Temecula — zone 9b, last frost Feb 14, first frost Jan 3
- Murrieta — zone 10a, last frost Feb 14, first frost Jan 3
More: all California cities · other zone 10a cities: Los Angeles, CA, Oakland, CA, Tampa, FL, Orlando, FL, Riverside, CA, Corpus Christi, TX, Port St. Lucie, FL, Scottsdale, AZ
Vista gardening questions
When is the last frost in Vista, CA?
Plan around Feb 24. At NOAA's Vista, CA station, 3.2 mi from the city center, there is a 30% chance of a 32°F frost after that date. Half of springs have their last frost by Jan 30, and after Mar 16 the risk drops to about 1 in 10. A hard freeze (28°F) usually ends earlier, around Dec 30. Springs here are erratic: 86 days separate the 90% and 10% dates, versus a median of 36 days for cities on this site, so watch the forecast rather than the calendar.
When should I plant tomatoes in Vista, CA?
Start seeds indoors Dec 30 – Jan 13 and set transplants outside Mar 3 – Mar 17, once nights stay above 50°F and the soil is near 60°F. With about 303 frost-free days, frost is not the main limit — fruit set drops when nights stay above about 75°F, so early plantings tend to do best. More: tomato planting dates by zone.
How long is the growing season in Vista?
About 365 days without a 32°F frost in a typical (median) year. In 9 years out of 10 the season lasts at least 318 days, and in 1 year in 10 it runs 365 days or more. In fall there is a 10% chance of frost by Dec 14 and a 30% chance by Dec 24. That ranks 21st longest of 84 California cities on this site.
When should I plant a fall garden in Vista?
Count back from the first fall frost (Dec 24): transplant broccoli Oct 1 – Oct 15; sow kale Oct 15 – Nov 12; sow lettuce Oct 15 – Nov 12; sow radishes Nov 12 – Dec 10. Hardy crops keep growing through light frosts; the median 28°F hard freeze here is Dec 30. How the math works: succession and fall planting.
Did Vista's hardiness zone change on the 2023 map?
No. Going by the zone that covers most of the city's land, Vista is zone 10a on both the 2012 and the 2023 USDA maps (PRISM/OSU ZIP listings). About 42% of U.S. ZIP codes kept their half-zone in 2023. Why the 2023 map is warmer.
How does Vista compare with Oceanside, CA?
Both are in zone 10a. The typical last spring frost in Vista (Feb 24) comes about 20 days later than in Oceanside, CA (Feb 4), 5 miles away, and the first fall frost is Dec 24 versus Dec 1. Vista sits about 185 ft higher, which explains part of the gap. The two cities use different NOAA stations.