When to plant in Red Bluff, CA
USDA Zone 9aRed Bluff, California frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A generous ~280-day season lets Red Bluff gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 9a is warm enough that Red Bluff can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
RED BLUFF MUNI 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 Red Bluff’s own odds, recorded at RED BLUFF MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 19 | Mar 30 | Mar 1 | Nov 1 | Nov 15 | Nov 30 |
| 32°F | Mar 30 | Feb 22 | Jan 17 | Nov 12 | Nov 29 | Dec 18 |
| 28°F | Feb 21 | Jan 13 | Dec 18 | Nov 28 | Dec 15 | 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 Red Bluff, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 48 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.
Red Bluff planting FAQ
When is the last spring frost in Red Bluff, CA?
Plan for the last spring frost in Red Bluff around February 22 (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 Red Bluff, CA?
The first fall frost in Red Bluff typically arrives around November 29 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Red Bluff in?
Red Bluff is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Red Bluff?
There are roughly 280 frost-free days in Red Bluff (a long growing season), running from the average last frost around February 22 to the first fall frost near November 29.
When should I plant tomatoes in Red Bluff?
In Red Bluff, start tomato seeds indoors around December 28–January 11, then transplant seedlings outdoors around March 1 once the danger of frost has passed.
Never miss a window in Red Bluff
An email when it’s time to start seeds, transplant, and sow — timed to Red Bluff’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Anderson · 31 km
- Redding · 45 km
- Shasta Lake · 57 km
- Chico · 59 km
- Oroville · 95 km
- Marysville · 127 km
- Yuba City · 127 km
- Linda · 131 km
Frost dates recorded at RED BLUFF MUNI AP, 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 Red Bluff, CA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024216. Retrieved from https://blissgarden.com/california/red-bluff.