Phoenix Gardening Guide (2026)
Desert; heat-tolerant and water-wise planting essential.
USDA zone
9
Typical last frost
02/15
Typical first frost
12/10
Quick answer (Phoenix): Gardeners here work in about a 298-day frost-free window around zone 9. State context: Arizona (zones 4–10). Start warm crops indoors ~6 weeks before the last frost of 02/15.
Your Phoenix planting calendar
Pre-filled with Phoenix's frost dates. Choose a crop to print your plan.
In Arizona (typical zone 4–10, last frost ≈ Feb 15, first frost ≈ Dec 10, 298-day season), your Tomato plan:
Start seeds indoors
Jan 4
Sow / transplant outdoors
Mar 1
First harvest
May 10
Spacing / depth
24″ / 0.25″
Month-by-month (Arizona, 2026)
| Month | Action |
|---|---|
| Jan | Start indoors |
| Feb | — |
| Mar | Sow · Transplant |
| Apr | — |
| May | Harvest |
| Jun | — |
| Jul | — |
| Aug | — |
| Sep | — |
| Oct | — |
| Nov | — |
| Dec | — |
Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3–13 suitable. Dates are typical; confirm with your county extension and watch the 10-day forecast.