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Browse Plants

Narrowed By:Zone: 5+ Flower Color: Blue+ Seasonal Interest: Fall
Displaying 1 - 20 of 46 listings   1 | 2 | 3View AllNext > Sort By: Sort
Agastache ‘Blue Fortune’ Agastache ‘Blue Fortune’
(Blue Fortune hyssop)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'Blue Fortune' produces spikes of powder-blue flowers held over large, deep green foliage. The plant stands approximately 36 inches tall with a mature width of 18 inches. Peak bloom occurs in midsummer when butterflies are plentiful.

Agastache foeniculum 'Golden Jubilee' Agastache foeniculum 'Golden Jubilee'
(Anise hyssop)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Anise hyssop has subtle but eye-catching chartreuse foliage. Its powder-blue, long-lasting flowers contrast nicely with its leaves.

Allium caeruleum Allium caeruleum
(Blue globe onion)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant produces dense clusters of bright blue flowerheads up to 1 inch wide. Its leaves clasp its stem and die back before flowering.

Amsonia montana 'Short Stack’ Amsonia montana 'Short Stack’
(Dwarf blue star)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Chalk up another great plant introduction from the folks at Plant Delights Nursery in Raleigh, North Carolina. This dwarf blue star grows to only about half the size of the species, making it well suited for gardens with limited space. It performs best in full to partial sun and is appreciative of moist, well-drained soil. The sky blue flowers appear in early spring above the clean, dark green foliage. Try planting 'Short Stack' in a mess and along bed edges for a winning display.

Amsonia tabernaemontana Amsonia tabernaemontana
(Willow blue-star)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

In addition to willow blue-star’s small but charming clusters of blue flowers in late spring, it has upright, willow-like leaves that turn clear yellow in fall.

Aster × frikartii Aster × frikartii
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant flowers profusely and for an exceptionally long time, from early summer to mid-fall. Its flowers are violet-blue.

Aster × frikartii 'Wonder of Staffa' Aster × frikartii 'Wonder of Staffa'
('Wonder of Staffa' aster)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This repeat-blooming aster produces bright, 2-inch-wide, violet-blue flowers from mid-summer into fall. It grows to 3 feet tall and 1 to 2 feet wide and prefers full sun and average, well-drained soil.

Aster dumosus Aster dumosus
(New York aster, Michaelmas daisy)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This is a short-growing aster with lilac-blue flowers and creeping rootstocks. Many cultivars exist. It can be used on steep slopes for erosion control.

Aster ericoides Aster ericoides
(Heath aster)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This clumping, bushy perennial has slender stems and small, lance-shaped, medium green leaves. From late summer to late fall, it produces white flowerheads with yellow centers to a half-inch across. Its cultivars may bear flowers tinged pink or blue.

Aster macrophyllus Aster macrophyllus
(Bigleaf aster)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Aster oblongifolius 'October Skies' Aster oblongifolius 'October Skies'
(October skies aster)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'October Skies' is a dwarf aster that is low to the ground and mounding. It flowers in the fall when most other plants have finished for the season, covering itself with hundreds of dark sky-blue flowers.

Aster tataricus Aster tataricus
(Tatarian aster)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Tatarian aster is an impressive, stately perennial with a flowering height of 3 to 6 feet. It can look you in the eye yet require no staking. More important, this aster flowers longer than any other garden aster, beginning in late September and early October and continuing into November. The 1-inch-wide, light lavender flowers are a magnet for local and migrating monarch butterflies. This plant tolerates many soil types, can form large colonies in a few years, and is easily divided.

Brunnera macrophylla 'Jack Frost' Brunnera macrophylla 'Jack Frost'
(4 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This woodland plant is valued for its flowers and its heart-shaped, ground-covering leaves. Its small blue flowers go nicely with ephemeral bulbs in mid- to late spring,  as the enlarging leaves block out the ripening bulb foliage. 'Jack Frost' can take dry summers and wet winters. This cultivar is prized for its improved tolerance of heat and sun. -Marty Hair, Regional Picks: Upper Midwest, Fine Gardening issue# 127

no image available Brunnera macrophylla 'Langtrees'
(Siberian bugloss)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This woodland plant is valued for its flowers and heart-shaped, groundcovering leaves. 'Langtrees' can take dry summers and wet winters. This cultivar is prized for its improved tolerance of heat and sun.

Campanula carpatica Campanula carpatica
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Upright, open bell-shaped flowers completely cover the foliage of this late-blooming Campanula for several months in summer. This small plant is suitable for the front of the border or a rock garden. Numerous cultivars are available.

Campanula lactiflora Campanula lactiflora
(Milky bellflower)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This upright bellflower grows to 4 or 5 feet with rounded leaves and conical spires of bell-shaped flowers in shades of blue, violet, or white.

Campanula poscharskyana 'Blue Waterfall' Campanula poscharskyana 'Blue Waterfall'
(Serbian bellflower)
(3 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Serbian bellflowers have an easy, undemanding habit. Creating a stream of lavender blue, the 1-inch-diameter star-shaped blossoms bloom reliably from late spring to early fall. The foliage remains evergreen in mild winters and needs to be sheared only once in a while to keep its appearance tidy. 'Blue Waterfall' flows beautifully along bed edges and through rock gardens in full sun to partial shade.

Caryopteris × clandonensis 'First Choice' Caryopteris × clandonensis 'First Choice'
(Blue beard, Blue-mist shrub)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'First Choice' is ideal for a mixed or shrub border. It's an attractive woody shrub with dark green leaves, dark purplish blue flowers, and a compact habit. Misty blue flowers appear in late summer and early autumn.This plant is relatively drought tolerant and very heat tolerant. The shrub expands as branches that touch the ground form their own roots and may self-seed.

Caryopteris × clandonensis 'Worcester Gold' Caryopteris × clandonensis 'Worcester Gold'
(Blue beard, Blue-mist shrub)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'Worcester Gold' is an attractive, mounding, woody shrub with warm yellow to chartreuse foliage and lavender-blue flowers in late summer and early autumn. The flowers are fragrant and attractive to bees and butterflies. The foliage is also aromatic. It is ideal for a mixed or shrub border.

Caryopteris incana 'Jason' Caryopteris incana 'Jason'
(Sunshine blue bluebeard)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

'Jason' has bright yellow-green foliage with rich amethyst blue flowers in late summer and fall. It's a vigorous grower for a mixed border or mass planting in sunny areas.


Displaying 1 - 20 of 46 listings   1 | 2 | 3View AllNext > Sort By: Sort