One of the best tools that you have as gardeners to help us estimate 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 using the USDA zone info for Middlesex it's a good idea to figure out when it's the best time to plant liatris.

Planting Calendar for Liatris

Frost tolerance for liatris:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant liatris a lot earlier in the year because they do well in cold.

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

The last month that you can plant liatris and expect a good harvest is probably September. If you wait any later than that and your liatris may not have a chance to grow to maturity. Starting your liatris indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Middlesex. In the coldest months of winter you can expect an average low temperature of -5°F.

Since the USDA zone info for Middlesex is an average the actual date of last frost is different every year. Since half of the time in Middlesex it frosts late in the year after April 15 be ready to cover your liatris in the event of one of those late frosts.

USDA Zone Info for Middlesex

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 Middlesex

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