Frost dates for Philomath, 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
May 15
typical year
Safe to plant
June 2
frost is over in 9 of 10 years
First fall frost
October 8
typical year
Growing season
145 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 17 – May 1 | – |
| Spinach | – | Apr 3 – 24 | Aug 13 – 27 |
| Lettuce | – | Apr 17 – May 8 | Aug 13 – 27 |
| Radishes | – | Apr 17 – May 29 | Aug 27 – Sep 10 |
| Onions | – | Apr 17 – May 1 | – |
| Potatoes | – | Apr 24 – May 8 | – |
| Carrots | – | Apr 24 – May 15 | Jul 16 – 30 |
| Beets | – | Apr 17 – May 1 | Jul 30 – Aug 13 |
| Kale | Mar 6 – 20 | Apr 17 – May 1 | Jul 30 – Aug 13 |
| Broccoli | Mar 6 – 20 | May 1 – 15 | Jul 30 – Aug 13 |
| Cabbage | Feb 20 – Mar 6 | Apr 17 – May 1 | Jul 30 – Aug 13 |
| Garlic | – | – | Aug 27 – Sep 17 |
| Warm-season crops | |||
| Tomatoes | Apr 7 – 21 | Jun 2 – 16 | – |
| Peppers | Mar 31 – Apr 14 | Jun 9 – 23 | – |
| Cucumbers | – | Jun 2 – 23 | – |
| Zucchini | – | Jun 2 – 30 | – |
| Pumpkins | – | Jun 2 – 23 | – |
| Green beans | – | Jun 2 – Jul 30 | – |
| Sweet corn | – | Jun 2 – 30 | – |
| Basil | Apr 28 – May 12 | Jun 9 – 16 | – |
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 2 | May 15 | April 28 |
| Fall frost before | September 24 | October 8 | October 26 |
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 April 25 (May 10 in a late year), and the first one in fall around October 28.
Towns that use these dates
This is the nearest NOAA station with frost records for 1 town.
Philomath
Where these dates come from
NOAA weather station CORVALLIS WATER BUREAU, OR US (USC00351877), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 14 miles:
97326, 97370
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.