The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant iresene in Zone 2a should be figured out by checking out the USDA zone info.

Planting Calendar for Iresene

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

Iresene require warm weather which means that it's important to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant iresene in Zone 2a 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 iresene and expect a good harvest is probably August. You probably don't want to wait any later than that or else your iresene may not have a chance to really do well. If you are starting your iresene indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Zone 2a the average date of last frost happens on May 15. You can expect an average low temperature of -50°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Zone 2a may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 2a it frosts late in the year after May 15 so be sure to be ready to protect your iresene if you have a late frost.

USDA Zone Info for Zone 2a

Here is the info for USDA Zone 2a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	August 15
Lowest Expected Low	-50°F
Highest Expected Low	-45°F

This means that on a really cold year, the coldest it will get is -50°F. On most years you should be prepared to experience lows near -45°F.

Plants to Grow in Zone 2a

You may be interested in your other planting guides for Zone 2a.