Datura metel grows 3 to 4 feet tall with large dark green leaves that have a bad smell. However, the large trumpet-shaped flowers have a sweet fragrance that spreads throughout the garden in the morning and evening. Flowers may be single or double and range from white and yellow to pink and purple.

This hardy, fast-growing evergreen shrub has an upright, rounded form and attractive flowers. Shiny green, needlelike leaves are aromatic. It bears small blue flowers in early spring and is loved for its strong, pinelike flavor and fragrance.

Golden oregano is a robust creeper with tiny, rounded leaves 1/2 to 1 inch wide. Small, pink or lavender to purple flowers stand out above the foliage in early to late summer.

In early- to mid-summer, this mat-forming thyme erupts with masses of 6-inch-high spikes covered with pink flowers. The light green, tiny foliage, hugging the ground in mats, has a pleasing lemon fragrance when crushed. This plant shines when spilling over stone walls or between the cracks in paving stones, where passersby can tread on the leaves and release the lemony scent.