When to plant in San Diego Country Estates, CA
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for San Diego Country Estates, California — all computed from San Diego Country Estates's nearest NOAA weather station.
With about 275 frost-free days, San Diego Country Estates supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 9b, frost is a minor factor for San Diego Country Estates — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in San Diego Country Estates is now 13 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
RAMONA FIRE DEPT · 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 San Diego Country Estates’s own odds, recorded at RAMONA FIRE DEPT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 28 | Apr 10 | Mar 17 | Oct 26 | Nov 19 | Dec 4 |
| 32°F | Apr 10 | Mar 4 | Jan 29 | Nov 17 | Dec 4 | Dec 18 |
| 28°F | Mar 1 | Jan 31 | Dec 23 | Dec 1 | Dec 19 | Jan 16 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in San Diego Country Estates, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
San Diego Country Estates planting FAQ
When is the last spring frost in San Diego Country Estates, CA?
On average, the last spring frost in San Diego Country Estates is around March 4 (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 San Diego Country Estates, CA?
In San Diego Country Estates, the first 32°F freeze of fall lands around December 4 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is San Diego Country Estates in?
San Diego Country Estates is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in San Diego Country Estates?
San Diego Country Estates has about 275 frost-free days — a long growing season — between the average last spring frost (March 4) and first fall frost (December 4).
When should I plant tomatoes in San Diego Country Estates?
For San Diego Country Estates, sow tomatoes indoors about January 7–January 21 and move the seedlings out around March 11, after the last spring frost.
Never miss a window in San Diego Country Estates
An email when it’s time to start seeds, transplant, and sow — timed to San Diego Country Estates’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at RAMONA FIRE DEPT, 11 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 San Diego Country Estates, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047228. Retrieved from https://blissgarden.com/california/san-diego-country-estates.