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Browse Plants

Narrowed By:Uses: Beds and Borders + Characteristics: Showy + Flower Color: Blue+ Spread: 1 - 3 ft+ Botanical Name: P - R
Displaying 1 - 15 of 15 listings   Sort By: Sort
Parahebe perfoliata Parahebe perfoliata
(Digger's speedwell)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This native of Australia has blue-green perfoliate leaves (similar to some eucalyptus) and blue-lilac flowers on somewhat floppy stems. Digger's speedwell likes a hot location and will ramble over walls or grow through shrubs beautifully.

no image available Penstemon albertinus
(Alberta beardtongue)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Deep blue, delicate spires to 16 inches tall appear late spring and early summer above thick, sturdy leaves.

Phlox divaricata 'Blue Moon' Phlox divaricata 'Blue Moon'
(Blue phlox, Wild sweet William, Woodland phlox)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This cultivar of the popular blue phlox has round, full flowers with overlapping petals. It is noteworthy for its particularly rich blue-violet color. Use it in rock gardens or alpine houses, in a dry wall, or as edging.

Phlox divaricata 'Clouds of Perfume' Phlox divaricata 'Clouds of Perfume'
(Blue phlox, Wild sweet William, Woodland phlox)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This is a very fragrant native woodland phlox with powder-blue flowers in spring. Reaching only 1 foot tall, it can spread to almost 2 feet and makes an attractive groundcover under shrubs or planted with other spring-blooming wildflowers. Leaves are semi-evergreen and hairy; stems root along their length. The blue flowers are salverform with petal lobes. This plant attracts hummingbirds and butterflies.

no image available Phlox divaricata and cvs.
(Blue phlox, Wild sweet William, Woodland phlox)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This spreading, semi-evergreen perennial has hairy leaves and lavender-blue to pale violet and white flowers borne in open clusters in early spring. Flowers can have notched or unnotched petal lobes. Cultivars include ‘Clouds of Perfume’ with light lavender-blue flowers; ‘Eco Texas Purple’ (dark purple with a violet eye); ‘Fuller’s White’ (white); and ‘London Grove’ (lavender-blue flowers).

Plumbago auriculata Plumbago auriculata
(Cape leadwort, Cape plumbago)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This evergreen shrub, native to South Africa, has long, skinny stems and phlox-like pale blue flowers. It can be used as a shrub, climber, pot plant, or groundcover.

Polemonium caeruleum Polemonium caeruleum
(Jacob’s ladder, Greek valerian)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This North American native bears deep blue or occasionally white, bell-shaped blossoms in spring and possibly late summer if deadheaded. It grows from 1 to 3 feet tall. Use Jacob's ladder in a lightly shaded border, rock garden, woodland, or cottage garden.

Polemonium caeruleum 'Brise d'Anjou' Polemonium caeruleum 'Brise d'Anjou'
(Variegated Jacob’s ladder, Greek valerian)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This dramatic cultivar has bright green leaves that are richly edged with cream. It bears lavender-blue blossoms in spring, and grows from 1.5 to 2 feet tall.

no image available Polemonium reptans
(Greek valerian, Jacob’s ladder)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This North American native bears light blue bell-shaped blossoms in spring to early summer. It has a lax, sprawling habit to 1.5 feet tall. The leaflets are arranged like the rungs of a ladder, hence the common name.

no image available Polemonium reptans 'Stairway to Heaven'
(Greek valerian, Jacob’s ladder)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This variegated cultivar offers white-edged leaves with pink tints on a compact plant to 1.5 feet tall. It bears light lavender-blue bell-shaped blossoms in spring.

Pulmonaria 'Silver Shimmers' Pulmonaria 'Silver Shimmers'
('Silver Shimmers' lungwort)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This eye-catching perennial has silver-plated leaves with speckled margins. Its blooms are among the largest of all lungworts, beginning as pink buds and opening in early spring to display platinum blue flowers.

This plant will eventually form a decent-sized mound that resembles a mountain of liquid silver. It's perfect in a woodland border and makes a great ground cover and container plant. In mild winters, its leaves may stay evergreen.

Pulmonaria longiflora 'Bertram  Anderson' Pulmonaria longiflora 'Bertram  Anderson'
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

‘Bertram Anderson’ is an older cultivar of lungwort with excellent foliage. In early spring, pink buds open to bright blue flowers, then silver-spotted leaves unfurl for a season-long show. Lungworts can have mildew problems, but ‘Bertram Anderson’ is highly resistant. When you cut off the old foliage in late winter, wear gloves; the tiny hairs all over the leaves (which keep the deer away) can irritate your skin. -Irvin Etienne, Fine Gardening #147 (October 2012), page 72

Pulmonaria saccharata 'Mrs. Moon' Pulmonaria saccharata 'Mrs. Moon'
(Bethlehem sage, lungwort)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This cheerful, reliable plant brings a nice touch of color to the garden in spring. The leaves are pointed and hairy and splattered with silvery blotches. As the plant grows, the leaves overlap, creating a swirly pattern. In spring, clusters of silky pink flowers appear. They fade to a soft blue that harmonizes well with the leaf color. -Sue Whetten, Regional Picks: Rocky Mountains, Fine Gardening issue #127

Rosmarinus officinalis 'Salem' Rosmarinus officinalis 'Salem'
(Rosemary)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This hardy, fast-growing evergreen shrub has an upright, rounded form and attractive flowers. Shiny green, needlelike leaves are aromatic. It bears small blue flowers in early spring and is loved for its strong, pinelike flavor and fragrance.

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.


Displaying 1 - 15 of 15 listings   Sort By: Sort