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.

In Robinson you can determine when it's the best time to plant tarragon by referring to the USDA zone info.

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.

Tarragon do ok in moderate cold which means that you can get them planted just a bit earlier than more sensitive plants.

The earliest that you can plant tarragon in Robinson is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant tarragon and expect a good harvest is probably August. Any later than that and your tarragon may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your tarragon indoors.

Last Frost Date

The average date of last frost is April 15 in Robinson. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Robinson may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Robinson you get surprised by a frost after April 15 so make sure that you are prepared to cover your tarragon in the event of a late frost.

USDA Zone Info for Robinson

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Robinson

You may be interested in your other planting guides for Robinson.