When to plant in Florence, AZ
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Florence, Arizona — is derived from the closest NOAA station with complete climate normals.
A generous ~316-day season lets Florence gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 9a, frost is a minor factor for Florence — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
FLORENCE · 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 Florence’s own odds, recorded at FLORENCE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 13 | Feb 21 | Jan 25 | Nov 12 | Nov 29 | Dec 19 |
| 32°F | Feb 24 | Jan 30 | Dec 27 | Nov 22 | Dec 12 | Jan 12 |
| 28°F | Feb 11 | Jan 8 | Dec 11 | Dec 1 | Dec 26 | Jan 31 |
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 Florence, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 29 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.
Florence planting FAQ
When is the last spring frost in Florence, AZ?
On average, the last spring frost in Florence is around January 30 (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 Florence, AZ?
Expect Florence's first fall frost near December 12 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Florence in?
Florence is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Florence?
Florence has about 316 frost-free days — a long growing season — between the average last spring frost (January 30) and first fall frost (December 12).
When should I plant tomatoes in Florence?
For Florence, sow tomatoes indoors about December 5–December 19 and move the seedlings out around February 6, after the last spring frost.
Never miss a window in Florence
An email when it’s time to start seeds, transplant, and sow — timed to Florence’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Coolidge · 18 km
- San Tan Valley · 18 km
- Queen Creek · 26 km
- Gold Canyon · 33 km
- Apache Junction · 37 km
- Casa Grande · 37 km
- Eloy · 40 km
- Gilbert · 41 km
Frost dates recorded at FLORENCE, 4 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 Florence, AZ — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00023027. Retrieved from https://blissgarden.com/arizona/florence.