An article about attracting hummingbirds to windowboxes, hanging plants, and other containers, it also includes the top ten flower varieties for hummingbirds. Here's an excerpt:

Although at least 150 North American flowering plants can attract hummingbirds, consider these favorites for hardiness and nectar production.

1. Coral Honeysuckle. Tough, cold hardy, loaded with nectar and trouble-free.
2. Shrimp Plant. Best grown in hanging baskets in warm weather.
3. Cardinal Climber. Cold hardy. Hummingbirds are attracted to dazzling red color.