Teucrium chamaedrys (Wall germander)

This compact, evergreen subshrub has glossy, dark green leaves and grows to only 5 inches tall and 16 inches wide. It bears long-lasting, lavender flowers, and it is a great choice for low edging or for a rock garden. 

This easy to grow evergreen yucca bears dramatic, sword-shaped yellow leaves with a dark green edge. Not as staunchly upright as some yuccas, its leaf tips sometimes droop with age. Its foliage color is best from fall to spring. Plants grow to nearly 2 feet in height and 3 feet in width. In summer, it produces a 6-foot-tall spike covered with nodding, fragrant, white bell-shaped flowers.

Lesser calamint produces fine, upright stems which are covered with small, shiny, dark green leaves, forming a little bush from 12 to 18 inches tall, and twice as wide. In late August, it produces a cloud of infinitesimal pale lavender flowers that continue blooming for up to six weeks. As the days become cooler, the color of the tiny, lipped blossoms deepens.

Giant-flowered purple sage has been winning over gardeners the past few years for its remarkable summer blooms and tough-as-nails demeanor. Native to the dry foothills and mountains of southern California, this sage is considered a woody shrub. It features showy, aromatic silver foliage and bicolored flower spikes with lavender-purple calyces and long, hummingbird-pollinated blue flowers. It grows from 24 to 36 inches high.