Frost dates for Delta Junction, AK
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
May 26
typical year
Safe to plant
June 9
frost is over in 9 of 10 years
First fall frost
September 2
typical year
Growing season
98 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 | – | Apr 28 – May 12 | – |
| Spinach | – | Apr 14 – May 5 | Jul 8 – 22 |
| Lettuce | – | Apr 28 – May 19 | Jul 8 – 22 |
| Radishes | – | Apr 28 – Jun 9 | Jul 22 – Aug 5 |
| Onions | – | Apr 28 – May 12 | – |
| Potatoes | Season usually too short. Try a quick variety or row covers. | ||
| Carrots | – | May 5 – 26 | Jun 10 – 24 |
| Beets | – | Apr 28 – May 12 | Jun 24 – Jul 8 |
| Kale | Mar 17 – 31 | Apr 28 – May 12 | Jun 24 – Jul 8 |
| Broccoli | Mar 17 – 31 | May 12 – 26 | Jun 24 – Jul 8 |
| Cabbage | Mar 3 – 17 | Apr 28 – May 12 | Jun 24 – Jul 8 |
| Garlic | – | – | Jul 22 – Aug 12 |
| Warm-season crops | |||
| Tomatoes | Apr 14 – 28 | Jun 9 – 23 | – |
| Peppers | Apr 7 – 21 | Jun 16 – 30 | – |
| Cucumbers | – | Jun 9 – 30 | – |
| Zucchini | – | Jun 9 – Jul 7 | – |
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | – | Jun 9 – 24 | – |
| Sweet corn | – | Jun 9 – Jul 7 | – |
| Basil | May 5 – 19 | Jun 16 – 23 | – |
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 9 | May 26 | May 14 |
| Fall frost before | August 19 | September 2 | September 18 |
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 15 (May 28 in a late year), and the first one in fall around September 16.
Towns that use these dates
This is the nearest NOAA station with frost records for 1 town.
Delta Junction
Where these dates come from
NOAA weather station WHITESTONE FARMS, AK US (USC00509793), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 25 miles:
99714
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.