Last frost date in Blackfoot, Idaho
May 5
Average last frost in spring. In an early year (1 in 10) it's over by April 23; in a late year (1 in 10) it comes after May 22.
October 3
Average first frost in fall. 1 year in 10 it comes by September 16.
Source: NOAA U.S. Climate Normals 1991–2020, station Blackfoot Fire Dept (USC00100915), 0.2 miles from Blackfoot, elevation 4,499 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 23 | May 5 | May 22 |
| First frost in fall | Sept 16 | Oct 3 | Oct 18 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 149
Planting calendar for Blackfoot
Fall planting
USDA dates for places whose average first freeze is about September 30 (Blackfoot: October 3).
- PotatoesMay 1 – June 15 (past for this year)
- Cauliflower plantsMay 10 – July 15 (past for this year)
- Cantaloupe (muskmelon)May 15 – June 1 (past for this year)
- New Zealand spinachMay 15 – July 1 (past for this year)
- WatermelonMay 15 – June 1 (past for this year)
- Eggplant plantsMay 20 – June 10 (past for this year)
- SoybeansMay 25 – June 10 (past for this year)
- BeetsJune 1 – July 10 (past for this year)
- Broccoli plantsJune 1 – 30 (past for this year)
- Brussels sprouts plantsJune 1 – 30 (past for this year)
- Cabbage plantsJune 1 – July 10 (past for this year)
- CarrotsJune 1 – July 10 (past for this year)
- Celery and celeriac plantsJune 1 – July 5 (past for this year)
- Chinese cabbageJune 1 – July 15 (past for this year)
- CucumbersJune 1 – July 1 (past for this year)
- DandelionJune 1 – Aug 1 (past for this year)
- Florence fennelJune 1 – July 1 (past for this year)
- Garden peasJune 1 – Aug 1 (past for this year)
- Leaf lettuceJune 1 – Aug 1 (past for this year)
- Lima beansJune 1 – 15 (past for this year)
- OkraJune 1 – July 1 (past for this year)
- ParsleyJune 1 – July 15 (past for this year)
- ParsnipsJune 1 – July 1 (past for this year)
- Peppers plantsJune 1 – July 1 (past for this year)
- RutabagaJune 1 – July 1 (past for this year)
- SalsifyJune 1 – 20 (past for this year)
- Snap beansJune 1 – July 10 (past for this year)
- SorrelJune 1 – July 15 (past for this year)
- Summer squashJune 1 – July 1 (past for this year)
- Sweet cornJune 1 – July 1 (past for this year)
- Swiss chardJune 1 – July 5 (past for this year)
- TomatoesJune 1 – 20 (past for this year)
- TurnipsJune 1 – Aug 1 (past for this year)
- Winter squashJune 1 – 15 (past for this year)
- Witloof chicoryJune 1 – July 1 (past for this year)
- Collards plantsJune 15 – July 15 (past for this year)
- EndiveJune 15 – Aug 1 (past for this year)
- Head lettuce plantsJune 15 – Aug 1 (past for this year)
- KaleJune 15 – July 15 (past for this year)
- KohlrabiJune 15 – July 15 (past for this year)
- Mustard greensJune 15 – Aug 1 (past for this year)
- RadishesJuly 1 – Sept 1 (past for this year)
- SpinachJuly 1 – Aug 15 (past for this year)
- Corn saladJuly 15 – Sept 1 (past for this year)
- Upland cressJuly 15 – Sept 1 (past for this year)
- Rhubarb plantsOct 1 – Nov 1Now
USDA lists chervil and chives, garlic, horseradish, leeks, onion plants, onion seed, onion sets, shallots as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about April 30 (Blackfoot: May 5).
- Corn saladMar 1 – May 1
- Onion setsMar 10 – Apr 10
- Cabbage plantsMar 15 – Apr 10
- GarlicMar 15 – Apr 15
- Onion seedMar 15 – Apr 15
- Asparagus plantsMar 20 – Apr 15
- Chervil and chivesMar 20 – Apr 20
- DandelionMar 20 – Apr 20
- Garden peasMar 20 – May 1
- PotatoesMar 20 – May 10
- RadishesMar 20 – May 10
- Rhubarb plantsMar 20 – Apr 15
- SpinachMar 20 – Apr 20
- TurnipsMar 20 – May 1
- BeetsApr 1 – June 15
- Broccoli plantsApr 1 – May 1
- Brussels sprouts plantsApr 1 – May 1
- Collards plantsApr 1 – June 1
- EndiveApr 1 – May 1
- Florence fennelApr 1 – May 1
- Head lettuce plantsApr 1 – May 1
- Horseradish plantsApr 1 – 30
- KaleApr 1 – 20
- KohlrabiApr 1 – May 10
- Leaf lettuceApr 1 – June 1
- LeeksApr 1 – May 1
- Mustard greensApr 1 – May 10
- Onion plants plantsApr 1 – May 1
- ParsleyApr 1 – May 1
- ParsnipsApr 1 – May 1
- SalsifyApr 1 – May 15
- ShallotsApr 1 – May 1
- SorrelApr 1 – May 15
- CarrotsApr 10 – June 1
- Cauliflower plantsApr 10 – May 10
- Upland cressApr 10 – May 10
- Celery and celeriac plantsApr 15 – May 1
- Swiss chardApr 15 – June 15
- New Zealand spinachMay 1 – June 15
- RutabagaMay 1 – June 1
- Summer squashMay 1 – 30
- OkraMay 10 – June 1
- Snap beansMay 10 – June 30
- Sweet cornMay 10 – June 15
- TomatoesMay 10 – June 15
- Black-eyed peasMay 15 – June 1
- Cantaloupe (muskmelon)May 15 – June 15
- CucumbersMay 15 – June 15
- Eggplant plantsMay 15 – June 10
- Lima beansMay 15 – June 15
- Peppers plantsMay 15 – June 10
- SoybeansMay 15 – June 15
- WatermelonMay 15 – June 15
- Sweet potatoesMay 20 – June 10
- Witloof chicoryJune 15 – July 1
USDA lists chinese cabbage as generally fall-planted here.
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.
Nearby in Idaho
- Chubbuck 19 mi · last frost May 16
- Pocatello 23 mi · last frost May 2
- Idaho Falls 26 mi · last frost May 9
- Ammon 27 mi · last frost May 9
- Rexburg 52 mi · last frost May 12