When to plant in Loma Linda, CA
USDA Zone 10aLoma Linda, California frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
With about 326 frost-free days, Loma Linda supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 10a, frost is a minor factor for Loma Linda — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
REDLANDS · 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 Loma Linda’s own odds, recorded at REDLANDS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 5 | Mar 2 | Jan 31 | Nov 17 | Dec 2 | Dec 19 |
| 32°F | Feb 28 | Jan 27 | Dec 21 | Dec 1 | Dec 19 | Jan 26 |
| 28°F | Feb 15 | Jan 7 | Dec 17 | Dec 13 | Jan 1 | Feb 13 |
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 Loma Linda, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Loma Linda planting FAQ
When is the last spring frost in Loma Linda, CA?
On average, the last spring frost in Loma Linda is around January 27 (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 Loma Linda, CA?
In Loma Linda, the first 32°F freeze of fall lands around December 19 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Loma Linda in?
Loma Linda is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Loma Linda?
Loma Linda has about 326 frost-free days — a long growing season — between the average last spring frost (January 27) and first fall frost (December 19).
When should I plant tomatoes in Loma Linda?
For Loma Linda, sow tomatoes indoors about December 2–December 16 and move the seedlings out around February 3, after the last spring frost.
Never miss a window in Loma Linda
An email when it’s time to start seeds, transplant, and sow — timed to Loma Linda’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Grand Terrace · 6 km
- Redlands · 7 km
- Colton · 7 km
- Highland · 11 km
- San Bernardino · 12 km
- Moreno Valley · 14 km
- Bloomington · 14 km
- Rialto · 16 km
Frost dates recorded at REDLANDS, 5 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 Loma Linda, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047306. Retrieved from https://blissgarden.com/california/loma-linda.