What Growing Zone Is 03109?

Our records indicate the United States Department of Agriculture has given zip code 03109 a growing zone designation of 6a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in zip code 03109's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used weather data from 1991 - 2020 in their analysis.

Latest New Hampshire growing zone map

If you are looking for plants suitable for growing in zip code 03109, head on over to our page on plants that grow well in Manchester, New Hampshire.

Heavy Duty Garden Utility Wagon

Let gardeners haul it all with this rugged utility wagon from Gorilla Carts.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Premium Garden Tool Gift Set

Deluxe tools for the gardener in your life to work the earth.

Latest New Hampshire growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since zip code 03109 is in growing zone 6a this means that plants there can survive temperatures as low as -10 to -5 degrees Fahrenheit. Plants for zip code 03109's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.

Some zones may have been changed by the USDA as of 2023. To see if zip code 03109 has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That's not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

View this profile on Instagram
PlantGuideOnline.com (@plantguideonline) • Instagram photos and videos

Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection for zip code 03109.

The USDA hardiness zone is 6a for zip code 03109. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

03109's Growing Zone Details

USDA Growing Zone: 6a

Zip Codes:

03109

Longitude: -71.40167

Latitude: 42.96594

Lowest Avg Temperatures (F): -10 to -5

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Smart Hydroponic Growing System

An easy to use hydroponic system that you can manage from your phone.

Life Is Better w/ Chickens Sign

A heart warming sign for the chicken lover in your life.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Stainless Steel Garden Tool Set

Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.

Map of the 03109 Area

All Towns In New Hampshire

Heavy Duty Garden Utility Wagon

Let gardeners haul it all with this rugged utility wagon from Gorilla Carts.

Unisex Summer Straw Hat

The wide brim on this premium unisex straw hat offers the best protection from the sun.