When to plant in Sahuarita, AZ
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Sahuarita, Arizona — is derived from the closest NOAA station with complete climate normals.
With about 275 frost-free days, Sahuarita supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 9a is warm enough that Sahuarita can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
GREEN VALLEY · 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 Sahuarita’s own odds, recorded at GREEN VALLEY.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 7 | Mar 15 | Feb 24 | Nov 1 | Nov 16 | Dec 2 |
| 32°F | Mar 18 | Feb 25 | Jan 31 | Nov 12 | Nov 27 | Dec 13 |
| 28°F | Feb 27 | Feb 1 | Jan 2 | Nov 22 | Dec 10 | Jan 5 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Sahuarita, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 22 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.
Sahuarita planting FAQ
When is the last spring frost in Sahuarita, AZ?
On average, the last spring frost in Sahuarita is around February 25 (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 Sahuarita, AZ?
In Sahuarita, the first 32°F freeze of fall lands around November 27 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Sahuarita in?
Sahuarita is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Sahuarita?
There are roughly 275 frost-free days in Sahuarita (a long growing season), running from the average last frost around February 25 to the first fall frost near November 27.
When should I plant tomatoes in Sahuarita?
In Sahuarita, start tomato seeds indoors around December 31–January 14, then transplant seedlings outdoors around March 4 once the danger of frost has passed.
Never miss a window in Sahuarita
An email when it’s time to start seeds, transplant, and sow — timed to Sahuarita’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Green Valley · 11 km
- Drexel Heights · 25 km
- Tucson · 26 km
- Valencia West · 26 km
- Vail · 27 km
- Tucson Estates · 31 km
- Tucson Mountains · 40 km
- Flowing Wells · 40 km
Frost dates recorded at GREEN VALLEY, 5 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 Sahuarita, AZ — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00023668. Retrieved from https://blissgarden.com/arizona/sahuarita.