One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By checking out the USDA zone info for Zone 1a it's possible to determine when it's possible to plant flax.

Planting Calendar for Flax

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

Since flax do well in moderate cold you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant flax 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 flax and expect a good harvest is probably July. Any later than that and your flax may not have a chance to fully mature. Starting your flax indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Zone 1a the average date of last frost happens on June 15. It might get as low as -60°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Zone 1a and it changes from year to year. Half of the time in Zone 1a you get a frost after June 15 so be sure to be ready to cover your flax if you have one of those late frosts.

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.