The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to estimate when it's the best time to plant fanflower by looking at the USDA zone info for Idaho Falls.

Planting Calendar for Fanflower

Frost tolerance for fanflower:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since fanflower require warm weather it's necessary to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant fanflower in Idaho Falls is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant fanflower and expect a good harvest is probably August. You probably don't want to wait any later than that or else your fanflower may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your fanflower indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Idaho Falls. In the coldest months of winter you should expect an average low temperature of -20°F.

It's important to remember that USDA zone info for Idaho Falls is just an average and the actual date of last frost changes from year to year. Since half of the time in Idaho Falls you get surprised by a frost after April 15 be ready to cover your fanflower if you have a surprise late frost.

USDA Zone Info for Idaho Falls

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Idaho Falls

You may be interested in your other planting guides for Idaho Falls.