Idaho Planting Zones & Schedule

Stretching across rugged mountains and fertile valleys, Idaho’s USDA growing zones range from Zone 3 in the north and higher elevations to Zone 7 in the warmer southern areas. The cooler regions of northern Idaho and the mountain ranges fall within Zones 3 to 5, where hardy vegetables like potatoes, kale, and carrots perform best.

Meanwhile, southern areas such as Boise and Twin Falls sit in Zones 6 and 7, offering longer, warmer growing seasons suitable for crops like tomatoes, peppers, and squash.

 

Idaho Last & First Frost Dates

  • *Keep in mind that frost can occur before or after these dates. Watch your local weather to determine the best time to plant.

  • The growing season in Idaho averages about 145 days statewide but can be as low as 30 days in high-elevation areas. Refer to the planting schedules below to determine the best timing for your zone.

Zone 3 Planting Schedule

Zone 4 Planting Schedule

Zone 5 Planting Schedule

Zone 6 Planting Schedule

Zone 7 Planting Schedule