When to plant in Mission Viejo, CA
USDA Zone 10bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Mission Viejo, California — all computed from Mission Viejo's nearest NOAA weather station.
A ~-4-day frost-free window makes Mission Viejo a short-season garden: choose early varieties and start long-season crops indoors well ahead of the last frost. Zone 10b is warm enough that Mission Viejo can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
LAGUNA BEACH · 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 Mission Viejo’s own odds, recorded at LAGUNA BEACH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 28 | Jan 30 | Dec 26 | Dec 1 | Dec 26 | Feb 2 |
| 32°F | Feb 11 | Jan 6 | Dec 13 | Dec 12 | Jan 2 | Feb 8 |
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 Mission Viejo, 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.
Mission Viejo planting FAQ
When is the last spring frost in Mission Viejo, CA?
Mission Viejo's average last spring frost falls near January 6 — 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 Mission Viejo, CA?
In Mission Viejo, the first 32°F freeze of fall lands around January 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Mission Viejo in?
Mission Viejo is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Mission Viejo?
There are roughly -4 frost-free days in Mission Viejo (a short growing season), running from the average last frost around January 6 to the first fall frost near January 2.
When should I plant tomatoes in Mission Viejo?
In Mission Viejo, start tomato seeds indoors around November 11–November 25, then transplant seedlings outdoors around January 13 once the danger of frost has passed.
Never miss a window in Mission Viejo
An email when it’s time to start seeds, transplant, and sow — timed to Mission Viejo’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Laguna Hills · 4 km
- Lake Forest · 5 km
- Rancho Santa Margarita · 6 km
- Coto de Caza · 7 km
- Ladera Ranch · 7 km
- Laguna Woods · 7 km
- Aliso Viejo · 7 km
- Laguna Niguel · 10 km
Frost dates recorded at LAGUNA BEACH, 14 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 Mission Viejo, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00044647. Retrieved from https://blissgarden.com/california/mission-viejo.