The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Zone 1a can be reviewed to figure out when it's a good idea to plant lettuce.

Planting Calendar for Lettuce

Frost tolerance for lettuce:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Lettuce tend to make it in moderate cold which tells us that you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant lettuce 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 lettuce and expect a good harvest is probably July. You probably don't want to wait any later than that or else your lettuce may not have a chance to really do well. You can get started a couple of weeks earlier by starting your lettuce indoors.

Last Frost Date

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

Since the USDA zone info for Zone 1a is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Zone 1a last frost occurs after June 15 be ready to protect your lettuce in the event of a 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.