Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to estimate when it's the best time to plant snow-in summer by using the USDA zone info for Zone 1a.

Planting Calendar for Snow-in Summer

Frost tolerance for snow-in summer:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant snow-in summer a little earlier in the year because they do well in moderate cold.

The earliest that you can plant snow-in summer 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 snow-in summer and expect a good harvest is probably July. Any later than that and your snow-in summer may not have a chance to fully mature. You can get started a few weeks earlier by starting your snow-in summer indoors.

Last Frost Date

On average the last frost is on June 15 in Zone 1a. In the coldest months of winter you can expect an average low temperature of -60°F.

Since the USDA zone info for Zone 1a is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 1a you get surprised by a frost after June 15 so be sure to be ready to cover your snow-in summer 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.