One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to estimate when it's possible to plant tarragon by checking out the USDA zone info for Zone 1a.

Planting Calendar for Tarragon

Frost tolerance for tarragon:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since tarragon do ok in moderate cold you can plant them a bit earlier in the year than more sensitive plants.

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

The last month that you can plant tarragon and expect a good harvest is probably July. You probably don't want to wait any later than that or else your tarragon may not have a chance to grow to maturity. You can get started a little bit earlier by starting your tarragon indoors.

Last Frost Date

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

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 1a and it will vary from year to year. Half of the time in Zone 1a there is a last frost after June 15 so make sure that you are ready to cover your tarragon if you have 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.