1. Huntington Botanical Gardens - In Southern California, this private garden housed 14 themed gardens, as well as art galleries with regularly changing shows and the famous Huntington Library. Be sure to visit for high tea.
2. Butchart Gardens - A jewel of
Vancouver Victoria, the gardens are a magnificent display of Victorian tradition tended for generations by the Butchart family. It has 55 acres that are open to the public.
3. Brooklyn Botanic Garden - With 13 themed gardens, as well as the conservatory and other collections, the Brooklyn Botanic Garden is an oasis that had humble beginnings as an ash dump in the 1800s. It celebrated its Centennial last year.
4. Denver Botanic Gardens - Encompassing 3 unique sites, the Denver Botanic Gardens were founded in 1951. It is one of the first gardens to emphasize native plants as well as water conservation and biological control of pests.
5. The United States Botanic Garden - Located in Washington DC, it is one of the oldest gardens in North America. The Conservatory allows a year-round escape into the beauty of the displays, Bartholdi Park showcases home landscape design and the National Garden displays the finest in Northeast native plants.
(Images: As linked above)