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Browse Plants

Narrowed By:Uses: Beds and Borders + Flower Color: Blue, Yellow+ Moisture: Medium to Wet
Displaying 1 - 20 of 25 listings   1 | 2View AllNext > Sort By: Sort
Abelmoschus manihot Abelmoschus manihot
(Hibiscus manihot)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A large ornamental okra with dinner-plate-sized, sulfur yellow flowers with dark eyes. Each flower lasts only a day—unfolding slowly in the morning and closing gradually in the evening—but the abundance of flowers open on any one day conceals their short life span.

Brugmansia 'Charles Grimaldi' Brugmansia 'Charles Grimaldi'
(Gold angels' trumpets)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Foot-long blossoms are nocturnally fragrant, and pour out from narrow calyces of light yellow, to terminate in fluted, reflexed openings the hues of golden summer squash.

Brugmansia suaveolens Brugmansia suaveolens
(Angels' trumpet)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Few plants evoke tropicalia quite like the Brugmansias, with their voluminous tubular flowers that drip from imposing shrubs or small trees. They look fantastic in containers or plunged into a border, and the dramatic display persists from late spring until autumn. In cooler climates, they may be brought under glass or cut back and held dormant in a cool basement.  All parts are highly toxic if ingested.

Chrysogonum virginianum var. australe Chrysogonum virginianum var. australe
(Goldenstar, Green-and-gold)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

From May to October, this perennial bears bright yellow, daisylike flowers on leafy stalks. It spreads by rooting runners to form an attractive groundcover that is easily controlled. This variety differs from the species in its more prostrate form and its more rapid spread.

Clematis crispa Clematis crispa
(Marsh clematis, Blue jasmine, Curly clematis)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A deciduous climber native to the southeastern United States, Clematis crispa bears lavender-blue, bell-shaped flowers with curly edges in summer. Its blooms are not profuse, but their elegant shape makes this plant a good choice for trellises, growing through shrubs, or planting in damp areas. The flowers are slightly fragrant and are followed by attractive seedheads. It also makes an unusual cut flower.

Digitalis grandiflora Digitalis grandiflora
(Yellow foxglove)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Originating in mountainous woodland and stony habitats from Europe to western Asia, yellow foxglove is tolerant of dry shade but flourishes with moisture. Arising in midsummer from neat clumps of fine-toothed foliage, a mass of soft yellow open bells, speckled brown inside, blooms along one side of a 3-foot-tall stem. Usually described as a perennial, it is more accurate to call it a biennial or short-lived perennial. If the flowering stalk is cut down after blooms have faded, it may rebloom in the fall. When a few flower stalks are left, the plant self-seeds. 

Hydrangea macrophylla 'Variegata' Hydrangea macrophylla 'Variegata'
(Bigleaf hydrangea, Florist's hydrangea)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This mound-forming shrub has white leaf margins and blue or pink lacecap inflorescences.

Hydrangea serrata Hydrangea serrata
(Mountain hydrangea)
(2 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Iris brevicaulis Iris brevicaulis
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Iris ensata Iris ensata
(Japanese iris)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This Laevigata iris bears 3 or 4 purple or red-purple blooms measuring 6 to 12 inches across, on single stems. Prominently ribbed leaves are 24 to 36 inches long. ‘Caprician Butterfly’ is a white, purple-veined cultivar.

Iris missouriensis Iris missouriensis
(Rocky Mountain iris, Wild blue iris)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This variable, beardless iris with narrow leaves to 20 inches long bears 2 to 4 blooms on each branched stem, in summer. The flowers have short, pale to deep blue or lilac-purple standards and larger falls with deep purple veining.

Iris sibirica Iris sibirica
(Siberian iris)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

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.

Lobelia siphilitica Lobelia siphilitica
(Blue cardinal flower, Great blue lobelia)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This clump-forming perennial has upright leafy stems. From late summer to mid-autumn, it bears dense spikes of light to bright blue tubular, two-lipped flowers with a more prominent lower lip.

no image available Lysichiton camtschatcensis
(White skunk cabbage)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

In early spring, this plant produces 16-inch-long, pointed white spathes that mask spikes of tiny green flowers, with no offensive odor. Large, glossy, leathery, oblong leaves 20 to 39 inches long grow from the base of the spathes.

Ruellia brittoniana 'Purple Showers' Ruellia brittoniana 'Purple Showers'
(Mexican petunia, Common ruellia, Wild petunia)
(7 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This three-foot-tall evergreen shrub bears many tubular, blue or purple, petunia-like flowers on dark stems over a long period. Each flower lasts for just one day. It is a fast grower that may self-seed aggressively. Use in a border, container, or at waterside. Can be grown as an annual in cooler areas.

Salvia uliginosa Salvia uliginosa
(Bog sage)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This moisture-loving perennial produces clear blue flowers with white highlights in late summer to mid-autumn. It forms an airy clump to 6 feet tall by 3 feet wide, and is great for the back of a border. It is tolerant of heavy soils.

Silphium perfoliatum Silphium perfoliatum
(Cup plant)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A coarse but bold perennial giant for the back of the border with yellow, daisy-like flowers in summer. Cups form where the toothed leaves meet the thick stems; birds are said to drink from the water held in the cups. Tough prairie natives that will self-sow, these plants need lots of sun and lots of room—a single plant can reach 7 or 8 feet tall and 6 feet across.

Stylophorum diphyllum Stylophorum diphyllum
(Celandine poppy, Flaming poppy, Wood poppy)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Celandine poppy is an eastern U.S. native wildflower with attractive leaves and flowers. It prefers moist, shady areas and will naturalize in a site it likes. Leaves are bluish green, deeply cut, and lobed. Summer brings bright yellow, poppy flowers in small clusters. Use in a woodland, border, or rock garden. It may become weedy.

no image available Thalictrum delavayi
(Yunnan meadow rue)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

From mid-summer to early autumn, this Thalictrum species has clusters of large, fluffy-looking flowers with lilac to white petals and pale yellow stamens atop wiry, purple-tinted stems and delicately textured foliage. Plants grow to 4 feet tall and half as wide.

no image available Thalictrum flavum ssp. glaucum
(Yellow meadow rue, Dusty meadow rue)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This classy specimen has beautifully textured, blue-gray foliage. Its summertime pale yellow flowers are petalless and fringed, occurring in clusters atop chalky bluish gray stems. Plant at the back of a border; it may require staking.


Displaying 1 - 20 of 25 listings   1 | 2View AllNext > Sort By: Sort