When to plant in Thousand Oaks, CA
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Thousand Oaks, California — is derived from the closest NOAA station with complete climate normals.
With only about -3 frost-free days, Thousand Oaks has a short season — start heat-lovers indoors early, favor quick-maturing varieties, and use row cover to stretch both ends. These dates come from a station roughly 19 km away, the closest with full normals; terrain around Thousand Oaks (elevation, water, pavement) can move your real frost dates a few days either way. In zone 10a, frost is a minor factor for Thousand Oaks — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Thousand Oaks is now 33 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
CAMARILLO 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 Thousand Oaks’s own odds, recorded at CAMARILLO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 9 | Feb 1 | Dec 24 | Nov 27 | Dec 17 | Jan 22 |
| 32°F | Feb 2 | Dec 31 | Dec 11 | Dec 7 | Dec 28 | Jan 29 |
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 Thousand Oaks, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 28 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.
Thousand Oaks planting FAQ
When is the last spring frost in Thousand Oaks, CA?
On average, the last spring frost in Thousand Oaks is around December 31 (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 Thousand Oaks, CA?
In Thousand Oaks, the first 32°F freeze of fall lands around December 28 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Thousand Oaks in?
Thousand Oaks is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Thousand Oaks?
Thousand Oaks has about -3 frost-free days — a short growing season — between the average last spring frost (December 31) and first fall frost (December 28).
When should I plant tomatoes in Thousand Oaks?
For Thousand Oaks, sow tomatoes indoors about November 5–November 19 and move the seedlings out around January 7, after the last spring frost.
Never miss a window in Thousand Oaks
An email when it’s time to start seeds, transplant, and sow — timed to Thousand Oaks’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Oak Park · 10 km
- Moorpark · 10 km
- Agoura Hills · 11 km
- Simi Valley · 14 km
- Camarillo · 15 km
- Calabasas · 20 km
- Malibu · 21 km
- Fillmore · 23 km
Frost dates recorded at CAMARILLO AP, 19 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 Thousand Oaks, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00023136. Retrieved from https://blissgarden.com/california/thousand-oaks.