Frost dates for Tucson Camp Ave Exp, AZ
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
February 20
typical year
Safe to plant
March 11
frost is over in 9 of 10 years
First fall frost
November 27
typical year
Growing season
280 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Jan 23 – Feb 6 | – |
| Spinach | – | Jan 9 – 30 | Oct 2 – 16 |
| Lettuce | – | Jan 23 – Feb 13 | Oct 2 – 16 |
| Radishes | – | Jan 23 – Mar 6 | Oct 16 – 30 |
| Onions | – | Jan 23 – Feb 6 | – |
| Potatoes | – | Jan 30 – Feb 13 | – |
| Carrots | – | Jan 30 – Feb 20 | Sep 4 – 18 |
| Beets | – | Jan 23 – Feb 6 | Sep 18 – Oct 2 |
| Kale | Dec 12 – 26 | Jan 23 – Feb 6 | Sep 18 – Oct 2 |
| Broccoli | Dec 12 – 26 | Feb 6 – 20 | Sep 18 – Oct 2 |
| Cabbage | Nov 28 – Dec 12 | Jan 23 – Feb 6 | Sep 18 – Oct 2 |
| Garlic | – | – | Oct 16 – Nov 6 |
| Warm-season crops | |||
| Tomatoes | Jan 14 – 28 | Mar 11 – 25 | – |
| Peppers | Jan 7 – 21 | Mar 18 – Apr 1 | – |
| Cucumbers | – | Mar 11 – Apr 1 | – |
| Zucchini | – | Mar 11 – Apr 8 | – |
| Pumpkins | – | Mar 11 – Apr 1 | – |
| Green beans | – | Mar 11 – Sep 18 | – |
| Sweet corn | – | Mar 11 – Apr 8 | – |
| Basil | Feb 4 – 18 | Mar 18 – 25 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | March 11 | February 20 | January 30 |
| Fall frost before | November 10 | November 27 | December 12 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around January 30 (February 24 in a late year), and the first one in fall around December 10.
Where these dates come from
NOAA weather station TUCSON CAMP AVE EXP, AZ US (USC00028796), 1991–2020 climate normals. It's the nearest station for 4 zip codes, all within 7 miles:
85712, 85715, 85718, 85750
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.