Phoenix, AZ · zone 10a · ~325 frost-free days
When to plant a garden in Phoenix.
In Phoenix, the typical last spring frost lands around Jan 24 and the first fall frost around Dec 15, giving you about 325 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Phoenix, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Dec 20 to Feb 19 | Jan 31 to Apr 2 | — |
| Lettuce, leaf | — | Jan 1 to Jan 31 | Oct 1 to Nov 30 |
| Carrot | — | Jan 1 to Jan 19 | Sep 19 to Oct 15 |
| Bush Bean | — | Jan 24 to Mar 16 | Aug 31 to Oct 3 |
| Cucumber, slicing | — | Jan 31 to May 2 | Aug 14 to Sep 14 |
| Pepper, bell | Dec 29 to Feb 19 | Feb 9 to Apr 2 | — |
| Kale | Nov 20 to Dec 3 | Jan 1 to Jan 14 | Sep 14 to Oct 30 |
| Spinach | — | Jan 1 to Jan 14 | Oct 1 to Nov 19 |
Phoenix sits in Zone 10a, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Phoenix garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 85004 in about 60 seconds.