USDA Plant Hardiness Zone Map for New Hampshire
New Hampshire has cold winters, with temperatures dropping as low as -35 degrees Fahrenheit in some areas. To help gardeners choose plants that can survive the cold, the United States Department of Agriculture (USDA) has created a plant hardiness zone map.
What is the USDA Plant Hardiness Zone Map?
The USDA Plant Hardiness Zone Map divides the United States into 13 zones, based on the average annual minimum temperature. Each zone is further divided into two subzones, a and b, with a being the colder of the two.
New Hampshire is divided into six USDA plant hardiness zones: 3b, 4a, 4b, 5a, 5b, 6a, and 6b. The coldest zone, 3b, is located in the northernmost part of the state, while the warmest zone, 6b, is located in the southernmost part of the state.
How to Use the USDA Plant Hardiness Zone Map
To use the USDA Plant Hardiness Zone Map, simply find your location on the map and note the zone number. This number will tell you which plants are likely to survive the winters in your area.
For example, if you live in zone 5a, you can choose plants that are rated for zones 5a and above. However, it is important to note that the USDA Plant Hardiness Zone Map is not foolproof. Other factors, such as elevation, urban heat, and proximity to water, can affect the temperature in your area.
Choosing Plants for Your USDA Zone
When choosing plants for your garden, it is important to select varieties that are rated for your USDA plant hardiness zone. This will help ensure that your plants will survive the winter and thrive in your climate.
There are many different types of plants that can survive the cold winters in New Hampshire. Some popular choices include:
- Trees: maple, oak, birch, pine, spruce
- Shrubs: rhododendron, azalea, hydrangea, viburnum
- Flowers: daisy, tulip, daffodil, iris, rose
- Vegetables: broccoli, cabbage, cauliflower, kale, spinach
Where to Find Reputable Nurseries
If you are not sure which plants are right for your USDA plant hardiness zone, you can consult with a reputable nursery. Reputable nurseries will only sell plants that are clearly marked with their USDA plant hardiness zone rating.
Other Factors to Consider
In addition to the USDA plant hardiness zone map, there are other factors to consider when choosing plants for your garden. These factors include:
- Elevation: Plants that are grown at higher elevations are exposed to colder temperatures than plants that are grown at lower elevations.
- Urban heat: Plants that are grown in urban areas are exposed to warmer temperatures than plants that are grown in rural areas.
- Proximity to water: Plants that are grown near water are exposed to more moisture than plants that are grown away from water.
By considering all of these factors, you can choose the right plants for your garden and ensure that they will thrive for many years to come.