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.

You will be able to figure out when you can plant spinach by referring to the USDA zone info for Somersworth.

Planting Calendar for Spinach

Frost tolerance for spinach:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Spinach do ok in moderate cold which means that you can plant them a bit earlier in the year than other plants that might not handle the cold.

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

Last Frost Date

On average the last frost is on April 15 in Somersworth. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Somersworth is an average the actual date of last frost changes from year to year. Half of the time in Somersworth there is a last frost after April 15 so always be ready to cover your spinach if you have one of those late frosts.

USDA Zone Info for Somersworth

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Somersworth

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