When to plant in Carlsbad, CA
USDA Zone 10bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Carlsbad, California — all computed from Carlsbad's nearest NOAA weather station.
With about 322 frost-free days, Carlsbad supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 10b, frost is a minor factor for Carlsbad — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
OCEANSIDE MUNI 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 Carlsbad’s own odds, recorded at OCEANSIDE MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 6 | Feb 27 | Jan 29 | Nov 7 | Nov 24 | Dec 12 |
| 32°F | Feb 22 | Jan 23 | Dec 22 | Nov 21 | Dec 11 | Jan 15 |
| 28°F | Jan 31 | Dec 31 | Dec 9 | Dec 3 | Dec 23 | Jan 25 |
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 Carlsbad, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Carlsbad planting FAQ
When is the last spring frost in Carlsbad, CA?
Carlsbad's average last spring frost falls near January 23 — 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 Carlsbad, CA?
Expect Carlsbad's first fall frost near December 11 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Carlsbad in?
Carlsbad is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Carlsbad?
Carlsbad has about 322 frost-free days — a long growing season — between the average last spring frost (January 23) and first fall frost (December 11).
When should I plant tomatoes in Carlsbad?
For Carlsbad, sow tomatoes indoors about November 28–December 12 and move the seedlings out around January 30, after the last spring frost.
Never miss a window in Carlsbad
An email when it’s time to start seeds, transplant, and sow — timed to Carlsbad’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Vista · 8 km
- Encinitas · 9 km
- San Marcos · 11 km
- Oceanside · 11 km
- Camp Pendleton South · 15 km
- Solana Beach · 16 km
- Escondido · 20 km
- Valley Center · 28 km
Frost dates recorded at OCEANSIDE MUNI AP, 12 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 Carlsbad, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053121. Retrieved from https://blissgarden.com/california/carlsbad.