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Narrowed By:Flower Color: Blue, Purple/Lavender+ Seasonal Interest: Fall
Displaying 1 - 20 of 201 listings   1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11View AllNext > Sort By: Sort
Acer japonicum 'Aconitifolium' Acer japonicum 'Aconitifolium'
(Full-moon maple, Fernleaf full-moon maple)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Full-moon maple has deeply lobed leaves, crimson autumn color, and plenty of small, reddish flowers in spring. It can be grown as a small tree or multi-stemmed shrub. Its growth habit is mounded, bushy, and spreading. The cultivar name 'Aconitifolium' refers to the fact that its ferny foliage resembles that of monkshood (Aconitum). This beautiful tree makes a great specimen plant and is very hardy.

Acer palmatum var. dissectum Acer palmatum var. dissectum
(Japanese maple, Threadleaf Japanese maple)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This round, mound-forming, deciduous Japanese maple has many qualities that make it an excellent garden plant, including a sculptural form, deeply cut foliage, arching shoots, and golden autumn color. The reddish purple flowers are tiny but attractive up close. They are followed by winged fruit. Threadleaf Japanese maple makes a beautiful specimen in small gardens and can be grown in large containers or used for bonsai.

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

A classic plant for both herb gardens and borders, anise hyssop is composed of erect branches of mint-and-licorice-scented, medium green leaves ending in fuzzy spikes of small lavender flowers. The plant grows to 3 to 5 feet tall and 1 foot wide and reseeds freely. The flowers are edible and are charming crumbled into salads. The flowers are highly attractive to bees, butterflies, and hummingbirds.

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.

Agastache rugosa Agastache rugosa
(Wrinkled giant hyssop, Korean hyssop, purple giant hyssop)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This 4-foot-tall and 18-ich-wide, bushy perennial, very similar to the more common anise hyssop (Agastache foeniculum) has strongly mint-and-licorice-scented leaves and short spikes of lavender-blue flowers from midsummer to early fall. Unlike most agastaches, both of these species can tolerate more moisture and humity, making them highly suited to climates outside the arid west.

Agastache rupestris Agastache rupestris
(Sunset hyssop)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

True to its name, sunset hyssop encapsulates a Western sunset in its flowers: bronze with hints of orange and yellow, and streaks of magenta and pink along the margins. More and more flowers emerge as summer progresses. The plant blooms heavily in August, and continues into autumn.

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

There are many cultivars available of this fast-growing annual. They are best used as bedding, edging, or container plants. Panicles of blue, pink, purple, or white flowerheads arise from oval, downy leaves in midsummer and continue until frost. They have a soft, fuzzy appearance and attract butterflies.

Ageratum houstonianum 'Blue Danube' Ageratum houstonianum 'Blue Danube'
('Blue Danube' ageratum, 'Blue Danube' floss flower)
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This early, compact bloomer grows to only about 6 or 7 inches tall. With its icy blue-purple flowers, it works well when planted tightly along the foreground of a bed. Its color blends easily with most other hues and textures. -Julia Jones, Designing with annueals, Fine Gardening issue #120

Allium 'Globemaster' Allium 'Globemaster'
(Ornamental onion)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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-shaped, deep lilac flowers in May and June.

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.

Allium cernuum Allium cernuum
(Nodding onion)
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This plant produces open clusters of pinkish purple, droplet-shaped flowers along drooping, arching 2-foot-tall stems. Its foliage is bluish green.

Allium giganteum Allium giganteum
(Ornamental onion)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

In summer, this plant bears large rounded flower heads up to 4 inches across with a multitude of star-shaped lilac-pink flowers.

Allium schubertii Allium schubertii
(Ornamental onion)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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 thunbergii Allium thunbergii
(Japanese onion)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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 or snow. Superior cultivars include ‘Ozawa’, with larger purple flower heads than the species. A white-flowered form known as A. thunbergii ‘Alba’ is a splendid plant, with cup-shaped florets sporting white stamens, yellow anthers, and green centers.

Amaranthus cruentus Amaranthus cruentus
(Prince's feather, Purple amaranth, Red amaranth)
(1 user review)

Amaranthus cruentus makes a striking statement in beds or borders. Growing to 6 feet in height, it bears somewhat fuzzy-looking spires of purplish red flowers in summer, followed by seed heads that can be red, purple, or yellow. It is native to tropical regions of North and South America, and is one of three Amaranthus species cultivated for their grain.

Ampelaster carolinianus Ampelaster carolinianus
(Climbing Carolina aster)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This perennial vine sends out abundant pale purple to lavender flowers beginning in late October. It grows to 4 to 5 feet tall, and frost does not seem to impede the blooms. It can attract bees and butterflies well into November.

To get the best flower display, give climbing aster as much sun as possible. It should also have something to lean on, like a fence, a trellis, or an ornamental shrub. Don't prune it over the winter, no matter how dead it may look. It’s better to wait to tidy up things after the new growth appears in spring.

Amsonia hubrichtii Amsonia hubrichtii
(Arkansas blue star)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Arkansas blue star's delicate, willow-like foliage is topped with pale blue star-shaped flowers in spring. The light green foliage looks good all summer, turns a beautiful golden-yellow in fall, and can stand through most of the winter, adding interest especially when mixed with grasses and other attractive seedheads. It grows to almost 3 feet tall and wide.

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.


Displaying 1 - 20 of 201 listings   1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11View AllNext > Sort By: Sort