When to plant in Tucson Estates, AZ
USDA Zone 9aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Tucson Estates, Arizona — all computed from Tucson Estates's nearest NOAA weather station.
With about 305 frost-free days, Tucson Estates supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 9a, frost is a minor factor for Tucson Estates — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
TUCSON 11 W · 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 Tucson Estates’s own odds, recorded at TUCSON 11 W.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 29 | Mar 4 | Feb 6 | Nov 11 | Nov 29 | Dec 13 |
| 32°F | Mar 8 | Feb 8 | Jan 6 | Nov 22 | Dec 10 | Jan 3 |
| 28°F | Feb 18 | Jan 20 | Dec 15 | Nov 30 | Dec 27 | Feb 1 |
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 Tucson Estates, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Tucson Estates planting FAQ
When is the last spring frost in Tucson Estates, AZ?
On average, the last spring frost in Tucson Estates is around February 8 (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 Tucson Estates, AZ?
Expect Tucson Estates's first fall frost near December 10 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Tucson Estates in?
Tucson Estates is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Tucson Estates?
Tucson Estates has about 305 frost-free days — a long growing season — between the average last spring frost (February 8) and first fall frost (December 10).
When should I plant tomatoes in Tucson Estates?
For Tucson Estates, sow tomatoes indoors about December 14–December 28 and move the seedlings out around February 15, after the last spring frost.
Never miss a window in Tucson Estates
An email when it’s time to start seeds, transplant, and sow — timed to Tucson Estates’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Valencia West · 5 km
- Drexel Heights · 8 km
- Tucson Mountains · 12 km
- Flowing Wells · 17 km
- Casas Adobes · 21 km
- Tucson · 24 km
- Catalina Foothills · 27 km
- Oro Valley · 30 km
Frost dates recorded at TUCSON 11 W, 8 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 Tucson Estates, AZ — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053131. Retrieved from https://blissgarden.com/arizona/tucson-estates.