When to plant in Roseville, CA
USDA Zone 9bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Roseville, California — all computed from Roseville's nearest NOAA weather station.
A generous ~275-day season lets Roseville gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. These dates come from a station roughly 25 km away, the closest with full normals; terrain around Roseville (elevation, water, pavement) can move your real frost dates a few days either way. In zone 9b, frost is a minor factor for Roseville — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SACRAMENTO METRO 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 Roseville’s own odds, recorded at SACRAMENTO METRO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Apr 1 | Mar 2 | Oct 24 | Nov 10 | Nov 25 |
| 32°F | Apr 1 | Feb 22 | Jan 10 | Nov 9 | Nov 24 | Dec 21 |
| 28°F | Feb 19 | Jan 17 | Dec 17 | Nov 21 | Dec 10 | Jan 18 |
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 Roseville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Roseville planting FAQ
When is the last spring frost in Roseville, CA?
Roseville's average last spring frost falls near February 22 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Roseville, CA?
In Roseville, the first 32°F freeze of fall lands around November 24 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Roseville in?
Roseville is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Roseville?
Roseville has about 275 frost-free days — a long growing season — between the average last spring frost (February 22) and first fall frost (November 24).
When should I plant tomatoes in Roseville?
For Roseville, sow tomatoes indoors about December 28–January 11 and move the seedlings out around March 1, after the last spring frost.
Never miss a window in Roseville
An email when it’s time to start seeds, transplant, and sow — timed to Roseville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Antelope · 7 km
- Rocklin · 7 km
- Citrus Heights · 9 km
- Foothill Farms · 10 km
- Lincoln · 12 km
- North Highlands · 12 km
- Orangevale · 12 km
- Granite Bay · 13 km
Frost dates recorded at SACRAMENTO METRO AP, 25 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 Roseville, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00093225. Retrieved from https://blissgarden.com/california/roseville.