Showy allium Allium rosenbachianum offers 4-inch-wide globes of purple flowers in summer. It grows 3 feet tall. Zones 4-10

'Stitch in Time' Hosta Hosta 'Stitch in Time' is a compact selection with green leaves edged in cream. The foliage has a unique quilted look. It grows 14 inches tall and 24 inches wide. Zones 3-9

'Stitch in Time' Hosta Hosta 'Stitch in Time' is a compact selection with green leaves edged in cream. The foliage has a unique quilted look. It grows 14 inches tall and 24 inches wide. Zones 3-9

'Silver Spring' allium Allium 'Silver Spring' bear's clusters of white flowers marked with a red-purple eye. This dramatic selection blooms in early summer and grows 2 feet tall. Zones 4-8

'Striptease' Hosta Hosta 'Striptease' features golden leaves with wide green edges. A thin white sliver separates the green and yellow colors. It grows 20 inches tall and 36 inches wide. Zones 3-9

'Striptease' Hosta Hosta 'Striptease' features golden leaves with wide green edges. A thin white sliver separates the green and yellow colors. It grows 20 inches tall and 36 inches wide. Zones 3-9

Star-of-Persia Allium cristophii bears distinct silvery-lavender flower globes measuring 12 inches in diameter atop tall 2-1/2-foot stems in late spring. Zones 4-9

'Sun Power' Hosta Hosta 'Sun Power' is a sun-tolerant variety with yellow-green leaves. It shows brightest color when it gets direct sun in the morning. 'Sun Power' grows 24 inches tall and 48 inches wide.

'Sum and Substance' Hosta Hosta 'Sum and Substance' is one of the largest and most popular hostas around. It has huge chartreuse leaves that can reach 24 inches long. The plant grows 24 inches tall and 60 inches wide. Zones 3-9

'Sum and Substance' Hosta Hosta 'Sum and Substance' is one of the largest and most popular hostas around. It has huge chartreuse leaves that can reach 24 inches long. The plant grows 24 inches tall and 60 inches wide. Zones 3-9

'Summer Beauty' allium Allium tanguticum 'Summer Beauty' shows off clusters of dark lavender-blue flowers in midsummer on 2-foot-tall stems. Zones 4-9

'Touch of Class' Hosta Hosta 'Touch of Class' is a stunning selection bearing chartreuse leaves widely edged in blue. It grows 7 inches tall and 24 inches wide. Zones 3-9

'Sun Power' Hosta Hosta 'Sun Power' is a sun-tolerant variety with yellow-green leaves. It shows brightest color when it gets direct sun in the morning. 'Sun Power' grows 24 inches tall and 48 inches wide.

'Touch of Class' Hosta Hosta 'Touch of Class' is a stunning selection bearing chartreuse leaves widely edged in blue. It grows 7 inches tall and 24 inches wide. Zones 3-9

'Whirlwind' Hosta Hosta 'Whirlwind' bears upright leaves that start out creamy white edged in green but become all green as the summer passes. It grows 5 inches tall and 40 inches wide. Zones 3-9

Turkestan onion Allium karataviense bears loosely clustered red-and-white flowers on 10-inch-tall stems in late spring. Zones 4-8

'Whirlwind' Hosta Hosta 'Whirlwind' bears upright leaves that start out creamy white edged in green but become all green as the summer passes. It grows 5 inches tall and 40 inches wide. Zones 3-9

'Wolverine' Hosta Hosta 'Wolverine' bears long, narrow blue-green leaves edged crisply in gold. It grows 15 inches tall and 40 inches wide. Zones 3-9

White giant allium Allium giganteum 'Album' is a white-flowering version of giant allium. It grows 6 feet tall. Zones 5-10

'Wolverine' Hosta Hosta 'Wolverine' bears long, narrow blue-green leaves edged crisply in gold. It grows 15 inches tall and 40 inches wide. Zones 3-9