When to plant in Fillmore, CA
USDA Zone 10aFillmore, California frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Fillmore's growing season is short at roughly -3 days, so succession planting is limited; lean on transplants over direct sowing for anything slow to mature. These dates come from a station roughly 25 km away, the closest with full normals; terrain around Fillmore (elevation, water, pavement) can move your real frost dates a few days either way. Zone 10a is warm enough that Fillmore can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Fillmore 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 Fillmore’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 Fillmore, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 30 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.
Fillmore planting FAQ
When is the last spring frost in Fillmore, CA?
Fillmore's average last spring frost falls near December 31 — 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 Fillmore, CA?
In Fillmore, 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 Fillmore in?
Fillmore is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Fillmore?
There are roughly -3 frost-free days in Fillmore (a short growing season), running from the average last frost around December 31 to the first fall frost near December 28.
When should I plant tomatoes in Fillmore?
In Fillmore, start tomato seeds indoors around November 5–November 19, then transplant seedlings outdoors around January 7 once the danger of frost has passed.
Never miss a window in Fillmore
An email when it’s time to start seeds, transplant, and sow — timed to Fillmore’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Moorpark · 13 km
- Santa Paula · 15 km
- Simi Valley · 21 km
- Camarillo · 22 km
- Thousand Oaks · 23 km
- Oak Park · 28 km
- Castaic · 28 km
- Stevenson Ranch · 31 km
Frost dates recorded at CAMARILLO 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 Fillmore, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00023136. Retrieved from https://blissgarden.com/california/fillmore.