Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Iowa Falls you can figure out when it's possible to plant scallions by looking at the USDA zone info.

Planting Calendar for Scallions

Frost tolerance for scallions:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant scallions a bit earlier in the year because they do ok in moderate cold.

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

The last month that you can plant scallions and expect a good harvest is probably August. Any later than that and your scallions may not have a chance to fully mature. Starting your scallions indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Iowa Falls. You should expect an average low temperature of -20°F in the coldest months of winter.

Keep in mind that USDA zone info for Iowa Falls is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Iowa Falls you get surprised by a frost after April 15 so be sure to be ready to cover your scallions in the event of one of those late frosts.

USDA Zone Info for Iowa 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 Iowa Falls

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