One of the best tools that you have as gardeners to help us figure out 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.

It's possible to estimate when it's possible to plant asparagus by using the USDA zone info for Zone 1a.

Planting Calendar for Asparagus

Frost tolerance for asparagus:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant asparagus much earlier in the year because they do well in cold.

The earliest that you can plant asparagus in Zone 1a is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant asparagus and expect a good harvest is probably July. You probably don't want to wait any later than that or else your asparagus may not have a chance to really do well. Starting your asparagus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Zone 1a the average date of last frost happens on June 15. In the coldest months of winter you should expect an average low temperature of -60°F.

Just be sure to remember that USDA zone info for Zone 1a is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 1a last frost occurs after June 15 be ready to protect your asparagus in the event of a surprise late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-60°F
Highest Expected Low	-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in your other planting guides for Zone 1a.