When to plant in Bonita, CA
USDA Zone 10bEverything below — frost dates, hardiness zone, and what to plant when in Bonita, California — is derived from the closest NOAA station with complete climate normals.
A generous ~359-day season lets Bonita gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 10b, frost is a minor factor for Bonita — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SAN DIEGO BROWN FLD · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Bonita’s own odds, recorded at SAN DIEGO BROWN FLD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 7 | Feb 2 | Dec 29 | Dec 1 | Dec 20 | Jan 25 |
| 32°F | Feb 5 | Jan 6 | Dec 13 | Dec 11 | Dec 31 | Jan 30 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Bonita, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 28 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Bonita planting FAQ
When is the last spring frost in Bonita, CA?
On average, the last spring frost in Bonita is around January 6 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Bonita, CA?
In Bonita, the first 32°F freeze of fall lands around December 31 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Bonita in?
Bonita is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Bonita?
Bonita has about 359 frost-free days — a long growing season — between the average last spring frost (January 6) and first fall frost (December 31).
When should I plant tomatoes in Bonita?
For Bonita, sow tomatoes indoors about November 11–November 25 and move the seedlings out around January 13, after the last spring frost.
Never miss a window in Bonita
An email when it’s time to start seeds, transplant, and sow — timed to Bonita’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- La Presa · 4 km
- Chula Vista · 5 km
- Spring Valley · 7 km
- Lemon Grove · 7 km
- National City · 9 km
- Casa de Oro-Mount Helix · 11 km
- La Mesa · 11 km
- Rancho San Diego · 13 km
Frost dates recorded at SAN DIEGO BROWN FLD, 12 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Bonita, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00003178. Retrieved from https://blissgarden.com/california/bonita.