When to plant in Apache Junction, AZ
USDA Zone 9bApache Junction, Arizona frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
With about 302 frost-free days, Apache Junction supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 9b is warm enough that Apache Junction can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
APACHE JUNCTION 5 NE · 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 Apache Junction’s own odds, recorded at APACHE JUNCTION 5 NE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 1 | Mar 6 | Feb 7 | Nov 7 | Nov 28 | Dec 15 |
| 32°F | Mar 7 | Feb 11 | Jan 5 | Nov 19 | Dec 10 | Jan 1 |
| 28°F | Feb 18 | Jan 13 | Dec 12 | Nov 28 | Dec 22 | 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 Apache Junction, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 19 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.
Apache Junction planting FAQ
When is the last spring frost in Apache Junction, AZ?
Plan for the last spring frost in Apache Junction around February 11 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Apache Junction, AZ?
In Apache Junction, the first 32°F freeze of fall lands around December 10 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Apache Junction in?
Apache Junction is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Apache Junction?
There are roughly 302 frost-free days in Apache Junction (a long growing season), running from the average last frost around February 11 to the first fall frost near December 10.
When should I plant tomatoes in Apache Junction?
In Apache Junction, start tomato seeds indoors around December 17–December 31, then transplant seedlings outdoors around February 18 once the danger of frost has passed.
Never miss a window in Apache Junction
An email when it’s time to start seeds, transplant, and sow — timed to Apache Junction’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Gold Canyon · 11 km
- Mesa · 16 km
- Queen Creek · 17 km
- Gilbert · 20 km
- San Tan Valley · 23 km
- Chandler · 31 km
- Fountain Hills · 31 km
- Sun Lakes · 36 km
Frost dates recorded at APACHE JUNCTION 5 NE, 10 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 Apache Junction, AZ — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00020288. Retrieved from https://blissgarden.com/arizona/apache-junction.