Calamintha nepeta (Lesser calamint)

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.

A native perennial shrub that grows to about 2 feet tall and wide and covers itself the whole season with honey-scented, white and yellow daisy flowers. The foliage is typical of the aster family. Plant en masse in a well-drained border or use in a rock garden. Blackfoot daisy can be short-lived.

This vigorous climber can easily cover a support of 8 to 10 feet tall once established. Finely textured, dense light-green foliage makes an excellent foil for dainty, pink and carmine teardrop-shaped flowers 2 inches across. Blooms appear in early August and continue well into autumn.

This dramatic architectural plant is one of the most beautiful variegated yuccas on the market. Its sword-shaped leaves bear bold central stripes of bright canary-yellow against a rich celadon edge. In cool weather, margins are tinged pink, and the entire yellow stripe turns rose-colored on many of the leaves, lasting through early spring. Plants grow to 2 feet wide and nearly as tall. Branched clusters of nodding, creamy-white bells open in mid-summer on stout stems that reach 6 feet tall.