When to plant in Grover Beach, CA
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Grover Beach, California — is derived from the closest NOAA station with complete climate normals.
With only about -28 frost-free days, Grover Beach has a short season — start heat-lovers indoors early, favor quick-maturing varieties, and use row cover to stretch both ends. Zone 10a is warm enough that Grover Beach can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Grover Beach 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 Grover Beach’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 Grover Beach, 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.
Grover Beach planting FAQ
When is the last spring frost in Grover Beach, CA?
On average, the last spring frost in Grover Beach 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 Grover Beach, CA?
The first fall frost in Grover Beach typically arrives around January 4 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Grover Beach in?
Grover Beach is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Grover Beach?
There are roughly -28 frost-free days in Grover Beach (a short growing season), running from the average last frost around February 1 to the first fall frost near January 4.
When should I plant tomatoes in Grover Beach?
In Grover Beach, start tomato seeds indoors around December 7–December 21, then transplant seedlings outdoors around February 8 once the danger of frost has passed.
Never miss a window in Grover Beach
An email when it’s time to start seeds, transplant, and sow — timed to Grover Beach’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Arroyo Grande · 3 km
- Nipomo · 15 km
- San Luis Obispo · 17 km
- Santa Maria · 26 km
- Los Osos · 28 km
- Orcutt · 33 km
- Morro Bay · 35 km
- Atascadero · 41 km
Frost dates recorded at PISMO BEACH, 7 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 Grover Beach, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00046943. Retrieved from https://blissgarden.com/california/grover-beach.