Yucca gloriosa (Mound lily, Spanish dagger)

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.

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.

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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 yucca-like Mexican plant has bold bluish leaves to 3 feet long that have tiny serrations on the edges. It makes a stunning accent in the garden or in a container. It is hardy to 10°F and extremely drought tolerant. Thousands of tiny white flowers bloom on a 4-foot stalk on mature clumps.