| Picture | Plant Name | Botanical Name | Plant Description |
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| Arctic Fire Pink | Dianthus deltoides 'Arctic Fire' | Mat-forming herbaceous perennial with numerous white flowers with rosy-red eyes. Narrow leaves are dark to bluish green. Tolerant of many soil types. Performs best in some shade. |
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| Coral Canyon Twinspur | Diascia integerrima 'Coral Canyon' | Long-blooming cold-hardy twinspur. Plant Select Winner in 2000. Shows excellent drought and heat tolerance. Abundant salmon-pink flowers bloom from mid-spring through frost. Fine gray-green foliage forms a compact mound. |
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| D'Anjou Pear | Pyrus communis 'Beurre D'Anjou' | Deciduous, fruit-bearing tree. Pure white flowers bloom in mid-spring followed by medium to large pears that ripen in September. Unlike other pears, D'Anjou's ripen green with only a slight blush and are more tart than other pears. Requires moderate amounts of water to support fruit growth. |
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| Dace Japanese Iris | Iris ensata 'Dace' | Upright-growing herbaceous perennial with long, linear, sword-shaped leaves. Large white flowers blushed with pink or lavender grow on tall stalks. Grows in wet soil and/or standing water. Grows in gardens with regular amounts of water. Does not tolerate wet winter soils. |
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| Daffodil | Narcissus spp. | Group of varied bulbous perennials. Flowers are borne singly or in clusters and consist of a corona (trumpet) surrounded by petals. Long slender leaves are dark green. Sizes vary and the smallest can under 6 inches with the tallest being close to 30 inches. Deer will not eat these plants and are a good bulb for areas with deer problems. Tolerant of many soil types and is a good example of a drought avoider, blooming early and reaching dormancy before the hot and dry months. |
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| Dallas Blues Switch Grass | Panicum virgatum 'Dallas Blues' | Clump-forming ornamental grass. Blue-green leaf blades are wider than most Panicums. Beautiful purple-tinged seed heads appear in late-summer to fall and provide great interest throughout the winter. Very versatile and tolerates a wide range of soil and climatic conditions. |
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| Dalmatian Iris | Iris pallida 'Variegata' | Native to the Dalmatia province of Croatia. This bearded iris features variegated sword-shaped leaves and large light-blue flowers. Spreads by rhizomes. |
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| Dancing Butterflies Peony | Paeonia lactiflora 'Dancing Butterflies' | Clump-forming herbaceous flowering perennial. Large fragrant deep pink single flowers are borne in late-spring. This early blooming variety is a showstopper. Dark green deeply lobed leaves are also very attractive. Plant in fertile well-drained soils. Tolerates some drought once established. |
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| Dark Knight Bluebeard | Caryopteris x clandonensis 'Dark Knight' | This is a nice 2-3 ft tall and wide perennial/shrub. It is best treated as a perennial along the Wasatch by being cut back each year. Prefers drier soils and full sun. Produces small blue flowers clustered together along each long stem. This variety grows darker blue flowers with silver foliage. Fast growing. |
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| Dart's Gold Ninebark | Physocarpus opulifolius 'Dart's Gold' | Compact, mounded deciduous shrub. Lobed leaves emerge golden yellow and mature to lime green in the middle of the summer. Clusters of white to pink flowers bloom in spring. Bark is exfoliating and reveals shades of red to brown underneath. Tolerates alkaline soils and drought. |
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| Davidson's Penstemon | Penstemon davidsonii | Low-growing evergreen perennial. Forms mats of leathery rounded dark green leaves. Bears panicles of dark-pink or purples tubular flowers in late-spring to early-summer. Not as cold or heat tolerant as other penstemons. Needs well-drained soils. |
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| Dawn Redwood | Metasequoia glyptostroboides | A tall deciduous conifer and a striking specimen in any landscape, provided it has room to grow. It's pyramidal form requires little or no pruning to achieve. Dark green needles turn bronze and fall in autumn. Prefers slightly acidic soils and may not survive in soils with extremely high alkalinity. Resistant to pollution and will tolerate some drought, though it prefers moist soils. |
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| Dazzler Blanketflower | Gaillardia x grandiflora 'Dazzler' | Clump-forming perrennial with large red-centered flowers with bright golden-yellow edges. Flowers bloom most profusely in the spring but continues to flower sporadically into the fall. Ornamental puff ball seed heads can be left on or removed to promote more blooming. Outstanding variety of blanketflower. |
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| Desert False Indigo | Amorpha fruticosa | A multi-stemmed shrub often described as "leggy." Beautiful alternate leaf pattern and slender spiked purple-blue flowers make this an intriguing plant. Blooms late spring through early summer. Native to eastern United States. Thrives in poor soils and dry conditions. |
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| Desert Four O'Clock | Mirabilis multiflora | Large spreading plant from large tap root. Lush dark green leaves all season, native to Utah and the southwestern United States. Attractive magenta blooms appear from mid-summer through frost. Requires little or no additional water, does not perform well if overwatered. A "must have" for any low-water landscape. Easy to maintain, stems detach easily from root at the end of the growing season. |
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| Desert Penstemon | Penstemon pseudospectabilis | Semi evergreen perennial native to New Mexico. Bright pink to red tubular flowers bloom in summer. Large, gray-green leaves contrast nicely with the flowers. Prefers hot locations with dry, well-drained soils. |
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| Desert Sunrise Hyssop | Agastache 'Desert Sunrise' | Upright growing fragrant perennial with a wispy look. Long-lasting bright orange-red blooms begin in mid-summer and last until the first freeze. This variety shows darker coloring than the species. Pale-green foliage emits a distinct root beer or licorice fragrance depending on your nose. Attractive to hummingbirds. Very drought tolerant but will use the water if it is available. |
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| Desert Willow | Chilopsis linearis | Small, multi-stemmed, deciduous tree. Despite its name it is not actually a willow. The name comes from its long, narrow, willow-like leaves. Bright pink to purple flowers appear throughout the summer. Favorite of hummingbirds. Only semi-hardy and may have some die-back during coldest years. Behaves more like a large shrub. |
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| Desert Zinnia | Zinnia grandiflora | Small, low-growing perennial native to the southwestern United States in some of the most inhospitable locations. Prefers full sun and well-drained soil. Dark yellow flowers make this an attractive plant for any water-wise landscape. Comes out of dormancy in summer so be patient. |
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| Diabolo Ninebark | Physocarpus opulifolius 'Diabolo' | Upright, spreading, coarsely leaved shrub. The purple leaves of this cultivar provide a stunning backdrop for the bright whitish-pink flowers that appear in mid to late-spring. Bark exfoliates on older shrubs. In the heat of the summer, the leaves may green up slightly. Tolerates a wide range of soil conditions. |
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