When to plant in Ramona, CA
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Ramona, California — all computed from Ramona's nearest NOAA weather station.
Ramona enjoys a long ~249-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9b is warm enough that Ramona can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
RAMONA AP · 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 Ramona’s own odds, recorded at RAMONA AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 1 | Apr 12 | Mar 28 | Oct 22 | Nov 7 | Nov 23 |
| 32°F | Apr 10 | Mar 19 | Feb 15 | Nov 6 | Nov 23 | Dec 10 |
| 28°F | Mar 10 | Feb 7 | Dec 30 | Nov 21 | Dec 10 | Jan 12 |
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 Ramona, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Ramona planting FAQ
When is the last spring frost in Ramona, CA?
On average, the last spring frost in Ramona is around March 19 (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 Ramona, CA?
In Ramona, the first 32°F freeze of fall lands around November 23 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Ramona in?
Ramona is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Ramona?
There are roughly 249 frost-free days in Ramona (a long growing season), running from the average last frost around March 19 to the first fall frost near November 23.
When should I plant tomatoes in Ramona?
In Ramona, start tomato seeds indoors around January 22–February 5, then transplant seedlings outdoors around March 26 once the danger of frost has passed.
Never miss a window in Ramona
An email when it’s time to start seeds, transplant, and sow — timed to Ramona’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- San Diego Country Estates · 9 km
- Poway · 15 km
- Escondido · 21 km
- Lakeside · 21 km
- Santee · 24 km
- Winter Gardens · 24 km
- Valley Center · 24 km
- Alpine · 25 km
Frost dates recorded at RAMONA AP, 4 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 Ramona, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053120. Retrieved from https://blissgarden.com/california/ramona.