There are newer books on fragrant plants, but there is no better read than The Fragrant Year: Scented Plants for Your Garden and Your House by Helen Van Pelt Wilson and Leonie Bell (M. Barrow and Company, 1967). Although this book is out-of-print, used copies are readily available online. Wilson is one of my favorite authors, who is able to combine extensive gardening experience with a delightful, conversational writing style. Although there may be newer varieties, the core information in this books will inspire you to explore the many possibilities of plants available, including trees, shrubs, vines, annuals, perennials, bulbs, herbs, and houseplants.
Favorite or New Plant
We don't often think of daylilies for their fragrance, but there certainly are some. For 1979 to 1997, the U. S. National Arboretum annually awarded daylily varieties for their fragrance. A variety from 1925, however, is the one that gardeners consistently turn to. 'Hyperion' is a diploid cultivar that features 4-inch, yellow flowers on stems rising to 36 inches tall. Although somewhat fragrant during the day, it particularly releases its sweet scent into the evening air. As with most daylilies, 'Hyperion' is heat- and drought-tolerant and easy to grow.