When to plant in Redlands, CA
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Redlands, California — all computed from Redlands's nearest NOAA weather station.
Redlands enjoys a long ~326-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 10a is warm enough that Redlands can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
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 Redlands’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 Redlands, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Redlands planting FAQ
When is the last spring frost in Redlands, CA?
Plan for the last spring frost in Redlands around January 27 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Redlands, CA?
The first fall frost in Redlands typically arrives around December 19 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Redlands in?
Redlands is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Redlands?
There are roughly 326 frost-free days in Redlands (a long growing season), running from the average last frost around January 27 to the first fall frost near December 19.
When should I plant tomatoes in Redlands?
In Redlands, start tomato seeds indoors around December 2–December 16, then transplant seedlings outdoors around February 3 once the danger of frost has passed.
Never miss a window in Redlands
An email when it’s time to start seeds, transplant, and sow — timed to Redlands’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Highland · 7 km
- Loma Linda · 7 km
- Yucaipa · 12 km
- Calimesa · 13 km
- Grand Terrace · 13 km
- Colton · 14 km
- Moreno Valley · 15 km
- San Bernardino · 15 km
Frost dates recorded at REDLANDS, 3 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 Redlands, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047306. Retrieved from https://blissgarden.com/california/redlands.