One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Woburn you can determine when it's a good idea to plant thyme by referring to the USDA zone info.

Planting Calendar for Thyme

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

Thyme do well in cold which tells us that you can start planting them much earlier than plants that are more sensitive to the cold.

The earliest that you can plant thyme in Woburn 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 thyme and expect a good harvest is probably September. If you wait any later than that and your thyme may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your thyme indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Woburn. It might get as low as -10°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Woburn is an average and the actual date of last frost is different every year. Since half of the time in Woburn you get a frost after April 15 be ready to cover your thyme if you have a late frost.

USDA Zone Info for Woburn

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 Woburn

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