One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Iowa Falls it's a good idea to determine when you can plant asparagus fern.

Planting Calendar for Asparagus Fern

Frost tolerance for asparagus fern:	Not tolerant of frost.
When to plant:	After the last frost.

Since asparagus fern are not cold tolerant you have to wait until after the last frost before you can plant them.

The earliest that you can plant asparagus fern in Iowa 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 asparagus fern and expect a good harvest is probably August. Any later than that and your asparagus fern may not have a chance to grow to maturity. You can get started a little bit earlier by starting your asparagus fern indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Iowa Falls. You can expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Iowa Falls may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Iowa Falls you get a frost after April 15 be ready to protect your asparagus fern if you have 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.