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Browse Plants

Narrowed By:Type: Perennials, Shrubs+ Zone: 2, 9+ Botanical Name: P - R
Displaying 1 - 20 of 123 listings   1 | 2 | 3 | 4 | 5 | 6 | 7View AllNext > Sort By: Sort
Pachyphragma macrophyllum Pachyphragma macrophyllum
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Rounded, ruffled leaves form a solid, weed-free, evergreen ground cover. In the spring, elongating shoots open to rounded heads of small four-petaled white flowers. Plants remain in bloom for nearly a month, opening new flowers from expanding terminal clusters as well as from numerous side shoots. Mature plants stand 12 to 18 inches high when in flower, and spread in time to form clumps 2 to 3 feet wide.

Pachysandra procumbens Pachysandra procumbens
(Allegheny spurge)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This clump-forming, semi-evergreen perennial has long prostrate stems and pewter-green foliage. Fragrant, bottlebrush-like white flowers are borne on 2- to 4-inch-long spikes in spring, as the foliage appears.

Paeonia suffruticosa Paeonia suffruticosa
(Tree peony)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This upright, sparsely branched, woody shrub reaches 4 to 10 feet tall. It's easy to grow but slow-growing. It displays dark green leaves that are blue-green beneath, and large, silken blossoms 6 to 12 inches across in late spring and early summer. The plants maintain a graceful branching structure throughout the winter.

Panicum virgatum 'Ruby Ribbons' Panicum virgatum 'Ruby Ribbons'
(Switch Grass)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Panicum Ruby Ribbons’ soft blue-green foliage emerges in the spring on upright, clumping plants. The foliage takes on a wine-red color in early summer, which intensifies as the season progresses. Flower heads appear in late summer, followed by ornamental seed heads, which, if left uncut, provide long-lasting winter interest.

Papaver nudicaule Papaver nudicaule
(Iceland poppy)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Iceland poppy is a short-lived perennial usually grown as a cool-weather annual, or biennial. From hairy tufts of linear blue-green foliage rise wiry stems bearing a pendant bud. The single (occasionally double) short-lived flowers unwrinkle their petals into a wide-spreading saucer shape 3 inches across.

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.

Pardanthopsis dichotoma Pardanthopsis dichotoma
(Vesper iris)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

The flowers of vesper iris open in the late afternoon over a period of several minutes, just about the time the sound of evening vespers might have wafted over an old monastery garden. It is a valuable addition to the garden also because of its late blooming season (high summer into early fall) and for its ability to bloom from seed started the same spring. The vesper iris has typical iris-looking leaf fans and abundantly branched, willowy bloom stalks rising to 4 feet. The inch-wide flowers range in color from pure white to violet.

no image available Pelargonium sidoides
(Kalwerbossie geranium , Silverleaf geranium)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This exemplary species has felted, gray, crinkled leaves. Over a long period, it exhibits sprays of butterfly-shaped, rich wine-red flowers, which contrast dramatically with the foliage. Its small stature makes it a perfect candidate for a container or a walkway edge. It has been used medicinally for the treatment of various infections, including bronchitis. It is a native of Africa.

Pennisetum setaceum 'Fireworks' Pennisetum setaceum 'Fireworks'
(Variegated Purple Fountain Grass)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A refreshing new look to an old time favorite ornamental grass! Pennisetum ‘Fireworks’ is the first variegated purple fountain grass. The midvein is the typical burgundy color and is flanked by hot pink margins. Produces beautiful red-burgundy foxtail flowers. Great accent plant and excellent in containers. -Santa Rosa Gardens

Penstemon 'Garnet' Penstemon 'Garnet'
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant is a bushy, vigorous perennial with smooth, narrow, dark green leaves and small, tubular, deep wine-red flowers borne in erect spikes, from early summer to late autumn.

Penstemon barbatus Penstemon barbatus
(Beardlip penstemon)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This erect perennial has basal rosettes and stems bearing lance-shaped mid-green leaves. The plant bears long panicles of scarlet or yellow flowers from early summer to early autumn.

Penstemon cardinalis Penstemon cardinalis
(Cardinal penstemon)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This New Mexico/Texas native offers the garden spikes of dangling, rich red flowers in midsummer that attract hummingbirds. Grow in a border, rock garden, or cottage garden. It appreciates a moist but well-drained soil, but can also take more xeric habitats.

no image available Penstemon clutei
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This upright perennial sports hanging, tubular bright-pink flowers to 1 inch across above serrated blue-green leaves. It blooms summer to fall.

Penstemon palmeri Penstemon palmeri
(Palmer's penstemon)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

A native of the Southwest, Palmer's penstemon sports sharp, prickly, gray leaves and thrives in the harsh conditions. Snapdragon-like pale pink flowers boom in late spring or early summer, and their sweet-honey scent attracts bumblebees. Toothed, sage green leaves skirt the upright stems for the rest of the gardening season.This perennial wildflower is one of the largest penstemons. It looks good in the back of a border or as a focal point, perhaps near a path where its fragrance can be enjoyed or in an informal grouping with other native penstemons and grasses, or with other plantss that have similar maintenance and water requirements. -Katie Nicolich, Plants to know and grow, Fine Gardening issue #120

no image available Penstemon parryi
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This upright perennial has funnel-shaped, bright pink flowers on 3-foot-tall stalks in spring.

Penstemon Phoenix™ Red Penstemon Phoenix™ Red
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This penstemon cultivar has huge red flowers with white throats on upright spikes. The plants bloom all summer, even more so when given a weekly dose of liquid fertilizer. Hardy in Zones 9 and above, Phoenix™ Red is usually grown as an annual.

Perovskia atriplicifolia Perovskia atriplicifolia
(Russian sage)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

The light, lavender-blue flowers, which attract butterflies to the garden, bloom in July, and often last throughout September. Russian sage is a particularly striking plant when grown along with white, yellow, or orange flowered perennials. Tones down bright yellow in the garden as well. Its silver-gray, deeply cut foliage and stiff stems are striking in the winter. -Santa Rosa Gardens

Persicaria polymorpha Persicaria polymorpha
(Giant fleeceflower)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This massive herbaceous shrub needs a lot of room to show off its vase-shaped form, but it does not spread or self-sow like some of its relatives. It blooms close to the ground from June and continues throughout the summer atop 6-foot-tall stems. The large, white, astilbe-like blossoms fade to pink and then reddish-brown as the season comes to a close. 

Philadelphus coronarius 'Aureus' Philadelphus coronarius 'Aureus'
(Mock orange)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Mock orange is an upright, deciduous shrub grown for its very fragrant, creamy white flowers that bloom in early summer. 'Aureus' has golden yellow leaves in spring that turn yellow-green in summer. Use in a shrub border or woodland garden.

Phlomis russeliana Phlomis russeliana
(Sticky Jerusalem sage)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

An unusual looking perennial from Turkey and Syria with hooded, pale yellow flowers encircling hairy stems. The flowers somewhat resemble Monarda. Leaves are aromatic and slightly fuzzy. P. russeliana reaches 3 feet tall and nearly as wide. Grow en masse in a border or near a warm wall.


Displaying 1 - 20 of 123 listings   1 | 2 | 3 | 4 | 5 | 6 | 7View AllNext > Sort By: Sort