Ajania pacifica 'Yellow Splash'

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Pacific chrysanthemum
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This low-mounding perennial has lobed, silver-edged foliage and small yellow flowerheads in autumn.

Ajuga reptans

Photo/Illustration: 
Michelle Gervais
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Carpet bugleweed
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This fast spreader has dark green leaves with deep blue flowers spring to summer.

Ajuga reptans 'Black Scallop'

Photo/Illustration: 
Courtesy of San Marcos Growers
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'Black Scallop' bugleweed
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Black foliage and spiky blue flowers (which appear in early summer) make a dramatic contrast. 'Black Scallop' thrives in full sun, which intensifies the black

Albizia julibrissin

Photo/Illustration: 
David Franko
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Mimosa
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A large shrub or small tree, Albizia julibrissin is native to Iran to Japan. It is a fast-growing plant whose seedlings can become invasive. It can be seen

Alcea rosea

Photo/Illustration: 
Michelle Gervais
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Hollyhock
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This tall, upright perennial has single flowers of various colors that grow along a spike. It blooms in early summer and midsummer.

Alchemilla alpina

Photo/Illustration: 
Jennifer Benner
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Alpine lady's mantle
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About a third the size of the more well known A. mollis , A. alpina has delicate leaves edged in brilliant silver.

Alchemilla mollis

Photo/Illustration: 
Steve Aitken
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Lady's mantle
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This plant has lobed, densely hairy, chartreuse foliage that is crimped at the edges. Soft, frothy, yellow-green foliage hovers above the plant from early

Allium 'Globemaster'

Photo/Illustration: 
Chris Curless
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Ornamental onion
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Allium 'Globemaster' is a true showstopper, growing to about 32 inches tall. Very large, majestic purple spheres up to 8 inches across bear numerous star-

Allium caeruleum

Photo/Illustration: 
Steve Aitken
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Blue globe onion
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This plant produces dense clusters of bright blue flowerheads up to 1 inch wide. Its leaves clasp its stem and die back before flowering.

Allium cernuum

Photo/Illustration: 
Mark McDonough
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Nodding onion
This plant produces open clusters of pinkish purple, droplet-shaped flowers along drooping, arching 2-foot-tall stems. Its foliage is bluish green.

Allium christophii

Photo/Illustration: 
Jennifer Benner
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Stars of Persia
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This bulbous perennial produces ribbed stems and strap-shaped, gray-green basal leaves that decline as its flowers form. In early summer, it bears umbels that

Allium giganteum

Photo/Illustration: 
Jennifer Benner
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Ornamental onion
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In summer, this plant bears large rounded flower heads up to 4 inches across with a multitude of star-shaped lilac-pink flowers.

Allium moly and cvs.

Photo/Illustration: 
Jennifer Benner
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Golden garlic
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For long-lasting bright yellow flowers that sparkle in midsummer, try Allium moly . It is robust, hardy, and an excellent cut flower, naturalizing and

Allium schoenoprasum

Photo/Illustration: 
Steve Aitken
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Chives
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The purple or white pom-pom flowers of chives top aromatic stems in summer. The leaves are edible and have a mild onion flavor; the flowers can be used as

Allium schubertii

Photo/Illustration: 
Courtesy of Dutch Gardens
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Ornamental onion
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This plant bears 12- to 18-inch blooms with nearly 100 pink-rose flowers. When the flowers are spent, they are replaced by airy, fluffy seedpods.

Allium senescens

Photo/Illustration: 
Courtesy of Devroomen
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Ornamental onion
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This plant has thin, strap-like foliage that tends to twist. It produces up to 30 long-lasting, 12- to 40-inch-tall pink or lilac flowers in mid- to late

Allium senescens var. glaucum

Photo/Illustration: 
Chris Curless
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Circle onion
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This plant's silver-blue leaves swirl like a cowlick. It produces flowers that are lollipop-shaped, pink with bright yellow accents and about 16 inches tall.

Allium sphaerocephalon

Photo/Illustration: 
Michelle Gervais
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Drumstick allium
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The drumstick allium has egg-shaped flowers in summer that start off green, then bloom and develop to pink and then clover red-purple. These plants are

Allium thunbergii

Photo/Illustration: 
Chris Curless
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Japanese onion
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This is the last of the ornamental onions to flower, when mop-like heads of rose-purple flowers appear with orange anthers. The flowers are impervious to frost