New England Wild Flower Society - The New England Wild Flower Society, with a branch in New Hampshire, is also the official wildflower and native plant society of the state. On their site, you can find a number of resources, including membership information, a calender of society sponsored events, and publications put out by the society to help you create your own small gardens and landscapes.
Wildflowers for North American Regions - While this site isn't technically a native plant specific site, it does include plenty of useful information for those interested in growing wildflowers. On this page, you'll find a list of wildflowers that grow well in specific regions. Within individual flower pages are garden design pictures showing the wildflowers in bloom along with facts and tips to help you grow your own successful wildflower gardens.
Landscaping with Native Plants - Brought to you by the New Hampshire division of the U.S. Department of Agriculture Natural Resources Conservation Service, this is an informative article that is sure to help you create your own landscaping or xeriscaping project using plants native to New Hampshire. Along with plenty of tips and advice about native plant landscaping, at the bottom of the page you will find several lists of plants that work well in a variety of different situations, such as dry areas or along ponds and streams.