Frost dates for Squaw Butte-Northern Great Bas, OR
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
June 11
typical year
Safe to plant
June 28
frost is over in 9 of 10 years
First fall frost
September 28
typical year
Growing season
107 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 | – | May 14 – 28 | – |
| Spinach | – | Apr 30 – May 21 | Aug 3 – 17 |
| Lettuce | – | May 14 – Jun 4 | Aug 3 – 17 |
| Radishes | – | May 14 – Jun 25 | Aug 17 – 31 |
| Onions | – | May 14 – 28 | – |
| Potatoes | – | May 21 – Jun 4 | – |
| Carrots | – | May 21 – Jun 11 | Jul 6 – 20 |
| Beets | – | May 14 – 28 | Jul 20 – Aug 3 |
| Kale | Apr 2 – 16 | May 14 – 28 | Jul 20 – Aug 3 |
| Broccoli | Apr 2 – 16 | May 28 – Jun 11 | Jul 20 – Aug 3 |
| Cabbage | Mar 19 – Apr 2 | May 14 – 28 | Jul 20 – Aug 3 |
| Garlic | – | – | Aug 17 – Sep 7 |
| Warm-season crops | |||
| Tomatoes | May 3 – 17 | Jun 28 – Jul 12 | – |
| Peppers | Apr 26 – May 10 | Jul 5 – 19 | – |
| Cucumbers | – | Jun 28 – Jul 19 | – |
| Zucchini | – | Jun 28 – Jul 26 | – |
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | – | Jun 28 – Jul 20 | – |
| Sweet corn | – | Jun 28 – Jul 26 | – |
| Basil | May 24 – Jun 7 | Jul 5 – 12 | – |
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 | June 28 | June 11 | May 18 |
| Fall frost before | September 3 | September 28 | October 13 |
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 May 24 (June 18 in a late year), and the first one in fall around October 13.
Where these dates come from
NOAA weather station SQUAW BUTTE-NORTHERN GREAT BAS, OR US (USC00358029), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 3 miles:
97758
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.