One of the first steps you take when you are figuring out 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.

In Somerville you can estimate when to plant tarragon by looking at 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.

You can plant tarragon slightly earlier in the year because they do ok in moderate cold.

The earliest that you can plant tarragon in Somerville 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 few weeks earlier by starting your tarragon indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Somerville. It might get as low as -5°F during the coldest months of winter.

Remember that USDA zone info for Somerville 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 Somerville it frosts late in the year after April 15 so just be sure to be ready to protect your tarragon in the event of a late frost.

USDA Zone Info for Somerville

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Somerville

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