When to plant in Arroyo Grande, CA
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Arroyo Grande, California — is derived from the closest NOAA station with complete climate normals.
Arroyo Grande's growing season is short at roughly -28 days, so succession planting is limited; lean on transplants over direct sowing for anything slow to mature. In zone 10a, frost is a minor factor for Arroyo Grande — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Arroyo Grande is now 27 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
PISMO 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 Arroyo Grande’s own odds, recorded at PISMO BEACH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 12 | Mar 1 | Jan 7 | Nov 22 | Dec 14 | Jan 21 |
| 32°F | Mar 13 | Feb 1 | Dec 18 | Dec 8 | Jan 4 | Feb 27 |
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 Arroyo Grande, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 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.
Arroyo Grande planting FAQ
When is the last spring frost in Arroyo Grande, CA?
On average, the last spring frost in Arroyo Grande is around February 1 (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 Arroyo Grande, CA?
The first fall frost in Arroyo Grande typically arrives around January 4 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Arroyo Grande in?
Arroyo Grande is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Arroyo Grande?
Arroyo Grande has about -28 frost-free days — a short growing season — between the average last spring frost (February 1) and first fall frost (January 4).
When should I plant tomatoes in Arroyo Grande?
For Arroyo Grande, sow tomatoes indoors about December 7–December 21 and move the seedlings out around February 8, after the last spring frost.
Never miss a window in Arroyo Grande
An email when it’s time to start seeds, transplant, and sow — timed to Arroyo Grande’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Grover Beach · 3 km
- Nipomo · 13 km
- San Luis Obispo · 18 km
- Santa Maria · 25 km
- Los Osos · 30 km
- Orcutt · 32 km
- Morro Bay · 37 km
- Atascadero · 41 km
Frost dates recorded at PISMO BEACH, 10 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 Arroyo Grande, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00046943. Retrieved from https://blissgarden.com/california/arroyo-grande.