Plant your butterfly garden in a sunny location (5-6 hours each day), but sheltered from the winds. Butterflies need the sun to warm themselves, but they won't want to feed in an area where they are constantly fighting the wind to stay on the plants. It is also a good idea to place a few flat stones in your sunny location so the butterflies can take a break while warming up.

Butterflies need water just like we do. Keep a mud puddle damp in a sunny location, or fill a bucket with sand and enough water to make the sand moist.
Image and Information from Proven Winners.

Annuals:Verbena, Petunia, Snapdragon, Impatiens, Nasturtium,Lantana
Perennials:Phlox, Rudbeckia's, Echinacea, Coreopsis, Bee Balm, Baptisia, Lupine, Lavender, Scabiosa, Violas
Herbs: Dill, Mint, Oregano, Parsley, Rue, Anise and Sages.
Shrubs:  Butterfly Bush, Hydrangea