Southern Magnolia (Magnolia grandiflora): Beautifully fragrant, creamy-to-white spring flowers; large, shiny, evergreen leaves with a fuzzy underside; and red fruit in fall. It's a large tree, reaching 60 to 80 feet tall and 30 to 50 feet wide.
Lily-of-the-Valley-best in smell and coverage-Don't let this little beauty fool you -- though it's small, lily-of-the-valley packs a big fragrance in its nodding white or pink bell-shape flowers. It's a tough, low-care groundcover you can practically plant and forget in shady spots
Lavender looks nice alone, but particularly with roses. You don't have to do much to it as it will do well during droughts. Its fragrant flowers are nice to have in the garden, and you can cut them and bring them inside. Many people dry them and use them in sachets.
Petunia Plants - Tumbelina Fragrant Mix "Priscilla" Melissa" "Joanna" : Cascades of fragrant flowers! A British-bred variety that's a must for hanging baskets and patio containers, producing mounded, trailing plants that are very free-flowering. The beautiful double blooms come in three harmonious colours (creamy white, blue vein and rose pink) all of which are deliciously scented. Trailing. (EG April 2013)