New Hampshire experiences a wide range of low temperatures. To understand which small tree will thrive in your yard, you need to check the USDA Plant Zone map. Look closely at the map of your state and find the area in which you live.
The zone map has divided New Hampshire into six zones. This map features different numbers for different areas. The northernmost part of the state lies in Zone 3b while Concord and Manchester are in Zone 5b.
If that sounds confusing, think of it this way - the lowest winter temperatures will vary according to each area of the state. For instance, low winter temperatures will be colder in the mountains than in coastal, urban, and low lying areas.
Once you determine the zone in which you live, then you can find trees and plants that will live through the winter. For example, Cherry, Dogwood, Hornbeam, and Conica spruce are appropriate for planting in zone 3 which is very cold. But if you live in a warmer section of the state, your options increase.