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This striking, richly-textured, deciduous ground cover has heart-shaped leaves that turn mauve in autumn. Purple, blue, or white flowers appear in late summer to early fall.
False blue indigo's spikes of clear blue flowers in late spring can nearly carry a border by themselves. They also make great cut flowers. Large, inflated nearly black seed pods set in after flowering, giving this plant another interesting element. It is low maintenance and will look great in any natural or informal setting.
This plant produces distinct, 2-inch blossoms primarily in rich blue (but also in shades of purple and white), with dark eyes smudged white. It is suitable for sun and partial shade.
Butterfly bushes are carefree deciduous shrubs that are reliably fragrant and easy to grow. Butterflies swarm to their blooms all summer long. 'Lochinch' has extremely fragrant lilac-blue flowers with orange eyes. It is a cross between B. davidii and B. fallowiana. Its arching, mounded habit typically reaches 3 to 5 feet in one season, but can grow much taller in the deep South. The 8- to 12-inch-long flower spikes begin in late summer and bloom until frost, starting a little later than the B. davidii cultivars.
Butterfly bushes are carefree deciduous shrubs that are reliably fragrant and easy to grow. Butterflies swarm to their blooms all summer long. 'Black Knight' has deep purple-blue, almost black, flowers in elongated clusters on arching branches to 10 feet tall if not cut back, and half that size if cut back. The blooms come from early summer to first frost. The foliage is willow-like and grayish green.
Spikes of violet, star-shaped flowers top stems reaching from 2 to 4 feet in late spring. The species is native to western Oregon. 'Blue Danube' would be beautiful in a border, meadow, or containers. Camassia make good cut flowers.
Bachelor's buttons bear charming and prolific flowers in hues of blue, pink, lavender, white, and maroon. Those with a true blue color are especially welcome in the garden as that color is rare in nature. Each disc-shaped flower is about 1.5 inches across, with ragged petals radiating out from the center.
This fragrant, blue-flowered species is more vigorous and heat tolerant than the blue cultivars. It blooms from late spring to early summer, and its foliage persists throughout the season with adequate moisture.
Belonging to the Belladonna Group hybrids, this delphinium bears loose, branched spikes of intense blue flowers with soft white edges. It may rebloom if deadheaded. The cultivar name pays homage to the resemblance of the flower color to Delft pottery.
The parent of the regal hybrid Delphiniums, the species has 3- to 4-foot-tall spires of blue, violet, lavender, or white flowers. It usually requires staking.
This compact species has cobweb-like, woolly foliage. The unique spherical flowerheads appear steely blue before maturing to a brighter blue. The late summer flowers add charm of form and texture to a mixed border.
This is one of the most widely recognized species of hydrangeas. It boasts a plentiful number of cultivars. The species is divided into two groups: the Hortensias (or "mopheads") have globe-shaped flowers made up of large male flowers, and the Lacecaps have flattened flower heads, with central, female blossoms ringed in larger, male blossoms.
This compact shrub bears attractive deep green leaves and large, rounded flower heads of deep pink in neutral soil, and intense violet-blue in acidic soil.
This re-blooming mophead features inflorescences ranging 4-6 inches wide. Their color will be pink or blue depending on aluminum availability in soil. Compact habit with glossy dark green leaves.
This is a well-loved and vigorous cultivar with large, rounded flower heads of a rich, gorgeous blue.
This mound-forming shrub has white leaf margins and blue or pink lacecap inflorescences.
This species was formerly grouped with the Lacecap hydrangeas because of its flattened flowerheads that consist of central, small florets surrounded by showy, larger florets. It is similiar to H. macrophylla but is a more compact plant with smaller flowers and leaves.
This pretty little blue-violet iris with yellow and white falls is native to the central U.S. Its early summer flowers are somewhat hidden among the foliage, as the stems are shorter than the leaves. In the wild, it grows in damp areas. In the garden, it appreciates a moist soil, especially in hot climates. Grow it where its flowers can be seen, such as at the front of a border, in a woodland, or at waterside.
Spectacular, but fleeting, stemless blooms have blue-lilac petals, each with a white patch and a yellow or orange crest on each fall. Crested iris blooms in May. Dagger-shaped leaves 5 to 6 inches tall form an attractive, cool green carpet of stiff leaves. ‘Alba’ is a white-flowered variety.
Attractive, grass-like leaves to 18 inches long are topped by showy flowers in a wide range of colors. Flowers unfurl in May and bloom well into June. Cultivars include ‘Caesar’s Brother’, with rich purple flowers; ‘Eric the Red’, a bright violet-pink Siberian; and ‘Chilled Wine’, a garnet iris suffused with blue.
Great Plants for a Fall Cutting Garden
Rely on colorful, long-stemmed plants to keep your vases filled as the season winds down
by Suzanne McIntire
Q&A Crafty everlasting flowers
by Suzanne McIntire
Drying Flowers in Sand
Use this technique to enjoy dried flowers year-round
by Georgia Vance
The Allure of Lavender
Intoxicating scents, wandlike flowers, and gray-green foliage ensure its enduring popularity
by Andy Van Havelingen
The Best Flowers for Your Cutting Garden
If you only grow a handful of vaseworthy flowers, these are the ones you need
by Catherine Mix
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