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Browse Plants

Narrowed By:Zone: 9+ Characteristics: Showy + Flower Color: Purple/Lavender+ Seasonal Interest: Summer+ Botanical Name: A - C
Displaying 1 - 20 of 34 listings   1 | 2View AllNext > Sort By: Sort
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 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.

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 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 schoenoprasum Allium schoenoprasum
(Chives)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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 garnishes. Plants grow in dense clumps to 2 feet high. Use chives in a cottage, herb, or vegetable garden, or in containers.

Allium sphaerocephalon Allium sphaerocephalon
(Drumstick allium, Round-headed garlic)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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 attractive in a bed or border, especially peeking up through other plants, such as roses, so that their nondescript foliage is hidden. Their vertical presence and eye-catching flower shape are valuable additions to the garden, and they naturalize freely.

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

This showstopper produces conspicuous, red-purple leaf sheaths with dense, purple domed flowerheads.

Angelonia angustifolia Angelonia angustifolia
(Angelonia)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Upright, low perennial with deep mauve to violet two-lipped flowers blooming all summer. Angelonia are superlative container plants, and can also be grown as bedding annuals.

Arisaema sikokianum Arisaema sikokianum
(Japanese cobra lily)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

The outside of the spathe is the color of dark chocolate, and the inside, milk white and as smooth as marble. Its hood sweeps up to an arrogant point, exposing its sumptuous white lining and the thick blunt spadix, which is also milk white. This plant produces two leaves per tuber, one leaf with three lobes and one with five. Sometimes they are mottled with silver, which makes them very handsome, at least until the plant goes dormant in summer.

Arisaema triphyllum Arisaema triphyllum
(Jack-in-the-pulpit)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A favorite of children, Jack-in-the-pulpit is a tuberous perennial producing one or two leaves, each divided into three narrow leaflets. But it's best known for its spring to early summer display of hooded, green spathes—Jack's pulpit—which are often striped with purple. Autumn brings clusters of densely packed, showy red berries.

Asarum shuttleworthii Asarum shuttleworthii
(Evergreen wild ginger)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This wild ginger is an evergreen groundcover with heart-shaped, shiny leaves that are often marbled. Its interesting brown-purple flowers hide beneath the foliage.

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.

Boltonia asteroides Boltonia asteroides
(False chamomile)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Boltonias are vigorous perennials grown for their sprays of aster-like flowers, which appear above clean, gray-green foliage. Their vigorous nature makes them suitable for naturalizing. They are also great in the border (and for cutting), but will benefit from frequent dividing to keep in bounds, and may be cut back in late spring for more compact plants.

Bouteloua gracilis Bouteloua gracilis
(Blue grama, Signal-arm grass, Mosquito grass)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Blue grama is a perennial grass from the Americas bearing unusually bent and flattened inflorescences. Being native to open grasslands, they are drought tolerant and at home in meadows. They provide the garden with shades of tan that persist throughout winter. 

Brachycome 'Blue Zephyr' Brachycome 'Blue Zephyr'
(Swan River daisy)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Swan River daisy's lacy foliage and small but profuse blue-purple flowers have a long season of impact in the garden. Its compact, bushy shape, pretty fragrant flowers, and gray-green leaves make it attractive from planting time through frost. It flowers so heavily that the foliage is often obscured. 'Blue Zephyr' has especially fine foliage and only reaches about a foot high. It is excellent in hanging baskets, window boxes, or other containers, or at the front of a bed or border.

Buddleia 'Lochinch' Buddleia 'Lochinch'
(Butterfly bush, Summer lilac)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Buddleia davidii Buddleia davidii
(Butterfly bush, Summer lilac)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This sun-lover comes in hues from pure white to deepest purple. From midsummer until frost, butterfly bush earns its name as hordes of winged beauties flit from flower to flower in search of nectar. The lanceolate leaves are 10 to 12 inches long and white or grayish underneath. The honey-scented flowers are deep purple and grow in spikes, from July to October.

Buddleia davidii 'Black Knight' Buddleia davidii 'Black Knight'
(Butterfly bush, Summer lilac)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Calamagrostis 'Karl Foerster' Calamagrostis 'Karl Foerster'
(Karl Foerster feather reed grass)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This versatile ornamental grass has slender, upright, deep-green foliage. A cool season grass, it is upright and clump forming, with purplish-green, feathery plumes that can reach 6 feet in height. It blooms in early summer rather than fall and must have winter chill to bloom.



Information provided by Santa Rosa Gardens.


Displaying 1 - 20 of 34 listings   1 | 2View AllNext > Sort By: Sort