There is a fourth dimension to any garden that may often be overlooked. This is the dimension of fragrance, and although its appreciation is not new, it seems to have been cast aside to make room for texture, form and color. Fragrance is subjective, and opinions of it diverse, but it is unquestionable that the garden planted with scented flowers offers the added bonus of fragrance in addition to form and color. It has been said that smell is the sense that is most memorable and that none of the other senses is more subtle in its suggestions or more reminiscent of a certain time.
The purpose of a flower's fragrance is thought to be that of an attractant to nectar-feeding insects. Not all perfumes are found in the flowers, however. Scents may also be found in roots, bark, gum or oils, leaves, stalks and sometimes in the seeds.
Generally, fragrant flowers are lightly colored or white. Although brilliantly colored flowers are not usually fragrant, there are exceptions. Flowers that are thick in texture, such as citrus, magnolia and gardenia, are often the most distinctive and intense in scent.