Mesa, AZ · zone 10a · ~299 frost-free days
When to plant a garden in Mesa.
In Mesa, the typical last spring frost lands around Feb 10 and the first fall frost around Dec 6, giving you about 299 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 Mesa, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Jan 6 to Mar 8 | Feb 17 to Apr 19 | — |
| Lettuce, leaf | — | Jan 3 to Feb 17 | Sep 22 to Nov 21 |
| Carrot | — | Jan 3 to Feb 5 | Sep 10 to Oct 6 |
| Bush Bean | — | Feb 10 to Apr 2 | Aug 22 to Sep 24 |
| Cucumber, slicing | — | Feb 17 to May 19 | Aug 5 to Sep 5 |
| Pepper, bell | Jan 15 to Mar 8 | Feb 26 to Apr 19 | — |
| Kale | Nov 22 to Dec 20 | Jan 3 to Jan 31 | Sep 5 to Oct 21 |
| Spinach | — | Jan 1 to Jan 31 | Sep 22 to Nov 10 |
Mesa 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 Mesa 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 85201 in about 60 seconds.