The USDA Zone info is a great tool for gardeners to help us figure out 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.

The USDA zone info for Plymouth should be used to determine when to plant summer savory.

Planting Calendar for Summer Savory

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

Summer Savory can survive in mild cold which tells us that you can plant them slightly earlier in the year than other plants that might not handle the cold.

The earliest that you can plant summer savory in Plymouth 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 summer savory and expect a good harvest is probably August. Any later than that and your summer savory may not have a chance to grow to maturity. You can get started a little bit earlier by starting your summer savory indoors.

Last Frost Date

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

Since the USDA zone info for Plymouth may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Plymouth it frosts late in the year after April 15 so just be sure to be ready to cover your summer savory if you have a late frost.

USDA Zone Info for Plymouth

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 Plymouth

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