When to Plant Sweet Potatoes in Idaho
In a typical Idaho location, plant outdoors May 14 – May 28. Across the state, the outdoor planting window starts as early as Apr 20 in Lewiston and as late as May 31 in Eagle. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.
Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.
Sweet Potatoes Planting Dates by City
| City | Plant outdoors |
|---|---|
| Boise | May 8 – May 22 |
| Meridian | May 8 – May 22 |
| Nampa | May 13 – May 27 |
| Idaho Falls | May 23 – Jun 6 |
| Pocatello | May 16 – May 30 |
| Caldwell | May 7 – May 21 |
| Coeur d'Alene | May 6 – May 20 |
| Twin Falls | May 14 – May 28 |
| Lewiston | Apr 20 – May 4 |
| Lewiston Orchards | Apr 20 – May 4 |
| Post Falls | May 6 – May 20 |
| Rexburg | May 29 – Jun 12 |
| Moscow | Frost-free: year-round planting |
| Eagle | May 31 – Jun 14 |
| Conda | Frost-free: year-round planting |
| Kuna | May 8 – May 22 |
| Ammon | May 23 – Jun 6 |
| Chubbuck | May 16 – May 30 |
| Hayden | May 6 – May 20 |
| Mountain Home | May 16 – May 30 |
| Blackfoot | May 19 – Jun 2 |
| Garden City | May 8 – May 22 |
| Jerome | May 16 – May 30 |
| Burley | May 21 – Jun 4 |
Showing the 24 most populous of 24 Idaho cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Idaho cities.
Frequently Asked Questions
When should I plant sweet potatoes in Idaho?
In a typical Idaho location, plant outdoors May 14 – May 28. Across the state, the outdoor planting window starts as early as Apr 20 in Lewiston and as late as May 31 in Eagle. 2 cities in Idaho are essentially frost-free and can plant on a year-round schedule.
When is the last frost in Idaho?
The average last spring frost in Idaho ranges from April 6 in Lewiston to May 17 in Eagle, based on NOAA 1991–2020 climate normals.
How long do sweet potatoes take to grow?
Sweet Potatoes typically take 90–120 days from planting to harvest. Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.
Other Crops in Idaho
- Tomatoes
- Peppers
- Eggplant
- Cucumbers
- Zucchini
- Winter Squash
- Pumpkins
- Watermelon
- Cantaloupe
- Corn
- Green Beans
- Peas
- Lettuce
- Spinach
- Kale
- Arugula
- Swiss Chard
- Broccoli
- Cauliflower
- Cabbage
- Brussels Sprouts
- Carrots
- Beets
- Radishes
- Turnips
- Onions
- Garlic
- Potatoes
- Asparagus
- Basil
- Cilantro
- Parsley
- Dill
- Oregano
- Thyme
- Sunflowers
- Zinnias
- Marigolds
- Cosmos
- Nasturtiums
- Dahlias
When to plant sweet potatoes in other states