When to plant in North Tustin, CA
USDA Zone 10bEverything below — frost dates, hardiness zone, and what to plant when in North Tustin, California — is derived from the closest NOAA station with complete climate normals.
A generous ~354-day season lets North Tustin gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 10b, frost is a minor factor for North Tustin — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
TUSTIN IRVINE RCH · 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 North Tustin’s own odds, recorded at TUSTIN IRVINE RCH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 5 | Feb 1 | Jan 3 | Nov 24 | Dec 13 | Jan 8 |
| 32°F | Feb 2 | Jan 5 | Dec 14 | Dec 3 | Dec 25 | Jan 20 |
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 North Tustin, 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.
North Tustin planting FAQ
When is the last spring frost in North Tustin, CA?
Plan for the last spring frost in North Tustin around January 5 (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 North Tustin, CA?
In North Tustin, the first 32°F freeze of fall lands around December 25 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is North Tustin in?
North Tustin is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in North Tustin?
North Tustin has about 354 frost-free days — a long growing season — between the average last spring frost (January 5) and first fall frost (December 25).
When should I plant tomatoes in North Tustin?
For North Tustin, sow tomatoes indoors about November 10–November 24 and move the seedlings out around January 12, after the last spring frost.
Never miss a window in North Tustin
An email when it’s time to start seeds, transplant, and sow — timed to North Tustin’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Tustin · 4 km
- Orange · 7 km
- Santa Ana · 9 km
- Irvine · 10 km
- Anaheim · 11 km
- Yorba Linda · 14 km
- Placentia · 14 km
- Garden Grove · 15 km
Frost dates recorded at TUSTIN IRVINE RCH, 8 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 North Tustin, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00049087. Retrieved from https://blissgarden.com/california/north-tustin.