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Narrowed By:Moisture: Dry to Medium, Wet+ Botanical Name: P - R
Displaying 1 - 20 of 24 listings   1 | 2View AllNext > Sort By: Sort
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.

no image available Panicum virgatum ‘Heavy Metal’
(Switch grass)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This rhizomatous perennial grass has a narrowly upright, clumping form. Mid-green stems bear stiff, erect, blue-gray leaves to 24 inches long. Foliage turns yellow in autumn. Weeping panicles of tiny purple-green spikes appear in early autumn.

Parthenium integrifolium Parthenium integrifolium
(Wild quinine, American feverfew)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Wild quinine bears lustrous foliage and long-lasting white flowers throughout the season, even in heat and drought. It is native to moist prairies, low meadows, and open woods from Massachusetts and Minnesota, south to Georgia and Arkansas.

Passiflora caerulea Passiflora caerulea
(Blue passion flower)
(4 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This plant produces 3- to 4-inch-diameter, slightly scented flowers sporadically during summer, increasing in late summer through autumn. Intricate blossoms have an outer ruffle of petals and sepals; an inner disc of filaments composed of rings of blue, white and purple; and a central “antenna.” Deeply lobed dark green leaves cover stems that grasp supports with tendrils. Blue passion flower can reach 10 feet tall in one season. The ovoid, orange-yellow fruit is edible.

Paulownia tomentosa Paulownia tomentosa
(Empress tree, Foxglove tree, Princess tree, Royal pawlonia)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This deciduous tree has thick shoots and large, lobed, bright green leaves. Fragrant pinkish lilac flowers appear in late spring with the foliage. When grown as a perennial, its robust shoots become sturdy stems 2 inches in diameter, with mammoth leaves as much as 2 feet across. Paulownia tomentosa can grow to 12 feet tall in a single season.

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.

Pelargonium tomentosum Pelargonium tomentosum
(Mint-scented geranium, Peppermint geranium)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

The velvety leaves of this choice species are pale green with long, silky hairs. The angora-like feel of the foliage is matched by its heavenly aroma of fresh mint. It bears clusters of dainty white blossoms in spring, but remains an exceptional foliage plant throughout the year.

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

no image available Pennisetum spathiolatum
(Slender veldt grass)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Native to South Africa, this non-invasive evergreen species produces showy pink flowers in spring, which are held 2 to 3 feet above the foliage on stiff, wiry stalks.

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 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.

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

'Husker Red' is one of the few penstemons that does well in wet winters and hot, humid summers. Ruby-toned leaves appear in spring, followed in late spring and early summer by 3-foot-high stems adorned by panicles of white blooms.  The flowers attract bees, hummingbirds, and butterflies, but the plants are not magnets for deer or rabbits. In autumn and winter, songbirds feast on the seed. For a stunning display, plant 'Husker Red' in groups. -Chris Kelley, Regional Picks: Midwest, Fine Gardening issue #120

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

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

no image available Phellodendron amurense
(Amur cork tree)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This spreading tree with a graceful habit bears glossy, dark green leaflets. Thick shoots grow quickly when young—and more slowly as the tree reaches maturity. In fall, foliage turns a handsome shade of yellow and the tree bears clusters of blue-black berries. Deeply corrugated, pale gray-brown bark is a striking feature; unfortunately, it doesn’t develop until the tree matures.

Physocarpus opulifolius 'Seward' Physocarpus opulifolius 'Seward'
(Summer Wine ninebark)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Many gardeners know ninebark as an undistinguished shrub with ordinary green leaves, white flowers, and fall fruit. But 'Seward,' sold under the trademark name Summer WineTM, has outstanding burgundy leaves and pink flowers that bloom in early summer. This plant is super tough and makes a stunning focal point in a summer border.

Plectranthus forsteri 'Green on Green' Plectranthus forsteri 'Green on Green'
(Swedish ivy)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

As the name implies, this plectranthus has green leaves with lime green edges. Some of the leaves are entirely lime green. It looks great mingling around the feet of perennials, shrubs, and annuals.

Potentilla fruticosa Potentilla fruticosa
(Shrubby cinquefoil)
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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

Shrubby cinquefoil is a bushy deciduous shrub growing to 3 feet tall and 5 feet wide that has been bred to include a multitude of cultivars that bear flowers in a large array of colors including white, yellow, pink, peach, orange, and red. The flowers are small, single, and rose-like and appear continuously from late spring to early fall on finely textured , dark green foliage.  

Ratibida columnifera Ratibida columnifera
(Mexican hat, Prairie coneflower, Long-head coneflower)
(3 user reviews)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This perennial coneflower, sometimes grown as an annual, has a long season of flowers on thin, branching stems. The flowers resemble small hats, with yellow reflexed ray florets and large greenish-brown columnar centers.

Rhus aromatica ‘Gro-low’ Rhus aromatica ‘Gro-low’
(Fragrant sumac)
(1 user review)
Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11

This vigorous shrub hugs the ground (to 2 feet tall) and spreads out to 8 feet, making it an excellent choice for stablizing a bank or smothering weeds. It has small yellow flowers, hairy red fruits, and glossy leaves that change to gorgeous orange-red in autumn. 


Displaying 1 - 20 of 24 listings   1 | 2View AllNext > Sort By: Sort