Delosperma ashtonii
Ice plant  (Zone 6)
This succulent plant has pointed green leaves that form nice rosettes. The foliage of this plant and spectacular soft pink flowers in early season make it a perfect choice for a rock garden or sunny border. A very compact plant only reaching 4" and spreading 12". Plants demand full sun and well-drained soil!
...............Available in 1-Quart only.

Delosperma cooperi
Ice Plant  (Zone 6)
Small bright pink flowers bloom all summer on this rock garden beauty! Small, succulent, egg-shaped leaves form compact mounds reaching 3-6” tall on this nice groundcover. A South African native, this plant prefers hot dry sites in full sun, which makes it quite useful for those hard to plant areas.
...............Available in Groundcover, 1-Quart and IMPACT containers.
 

Delosperma Mesa Verde^TM (PP13876) ('Kelaidis')
Mesa Verde^TM Ice Plant  (Zone 4)
This Plant Select^TM introduction is a terrific plant for hot and sunny locations where soils are well-drained. Light-green succulent foliage forms a luscious carpet from which beautiful 2" wide salmon-pink flowers bloom from spring to fall! Attractive in rock gardens or along the edge of a walkway. Plants grow to 2" tall.
..............Available in 1-Quart and IMPACT containers.

Delosperma nubigenum
Hardy Ice Plant (Zone 5)
A wonderful plant for poor soils! This ice plant features bright yellow flowers that bloom atop tight spreading mounds of light-green succulent leaves. Plants grow rapidly and are nice to use in rock gardens or edging along the front of the border. Plants reach 3" tall and grow best in full sun and well-drained soil.
.............Available in Groundcover and IMPACT containers.

Delphinium - Belladonna Group

Delphinium ‘Bellamosum’
Delphinium  (Zone 2)
This Larkspur is fuller and more branched than typical ones. 'Bellamosum' has deep blue flower spikes that can reach 48" tall. This plant thrives in full sun, alkaline soils and blooms in early summer. Deadheading spent flowers can lengthen bloom period.
...............Available in 1-Quart only.
 

Delphinium ‘Casa Blanca’
Delphinium  (Zone 2)
This Belladonna Group delphinium has pure white flowers that bloom in summer on plants that grow up to 5’.
...............Available in 1-Quart only.

 

Delphinium exaltatum
Delphinium  (Zone 5)
Spurred blue flowers are borne on 3-6’ flower spikes from mid to late season on this woodland delphinium. This plant can tolerate part to full shade and average to rich soils. It prefers moist soils, but once established, it is somewhat drought tolerant. It is an excellent plant for the edge of a woodland garden!
...............Available in 1-Quart only.
 

Delphinium grandiflorum ‘Summer Blues’
Delphinium  (Zone 4)
This Delphinium is a sky blue flowering twin of 'Summer Nights'. It is a dwarf variety with excellent heat tolerance. This plant grows 18" tall and is an excellent choice for the mixed border, cut flower, and rock gardens.
...............Available in 1-Quart only.
 

Delphinium grandiflorum ‘Summer Blues’
Delphinium (Zone 4)
The newest in the ‘Summer’ series of delphiniums. This cultivar has pale pink flowers that bloom just as abundantly as other delphiniums that we grow. Plants are heat tolerant as well and can tolerate drier soils than other varieties. They grow 12-18" tall.
...............Available in 1-Quart only.

Delphinium grandiflorum ‘Summer Nights’ 
Larkspur  (Zone 4)
This delphinium is a deep blue flowering dwarf variety with excellent heat tolerance. This plant grows 18" tall and is an excellent choice for the mixed border, cut flower, and rock gardens.
...............Available in 1-Quart only.
 

Delphinium grandiflorum ‘Summer Stars’
Larkspur  (Zone 4)
Another winner in the ‘Summer’ series of delphiniums! This cultivar has pure white flowers that bloom just as abundantly as other delphiniums that we grow. Plants are heat tolerant as well and can tolerate drier soils than other varieties.
..............Available in 1-Quart only.

Dendranthema (Chrysanthemum) ‘Clara Curtis’  
(Rubellum Group)
Hardy Mum  (Zone 5)
This hardy mum selection produces beautiful 3" fragrant pink daisy-like flowers in Mid to Late-season. ‘Clara Curtis’ will grow 18-24" tall in full sun and average, well-drained garden soil. Plants should be pinched at least once in early summer to encourage tighter, more compact plants with a heavier bloom count. No garden should be without a hardy mum!
...............Available in 1-Quart only.
 

Dendranthema (Chrysanthemum) ‘Hillside Pink Sheffield’ 
(Koreanum group)
Hardy Mum  (Zone 5)
An old fashioned variety with single ray flowers of pale apricot-pink. Its charming look is perfect for cottage gardens and the flowers are great for cutting. It reaches 3’ tall and prefers full sun and average soils.
...............Available in 1-Quart only.

Dendranthema (Chrysanthemum) ‘Mary Stoker’  
(Rubellum Group)
Hardy Mum  (Zone 3)
Amber colored daisy-like flowers are produced on this easy to grow perennial. Plants bloom from the middle of summer into the fall. This is a great color to have blooming in the garden at that time as it will coordinate with all of your other fall décor! Plants are easy to grow in average soils and full sun.
...............Available in 1-Quart only.

Dendranthema (Chrysanthemum) weyrichii ‘White Bomb’
Hardy Mum  (Zone 3)
Single white blooms with yellow eyes bloom in fall on this semi-evergreen groundcover. This plant prefers full sun to part shade and grows 8" tall and can spread up to 24". It is a very useful plant, bringing late season color into the garden, as well as being a good cut flower. It is also deer resistant.
..............Available in 1-Quart only.

Dianthus arenarius ‘Snow Flurries’
Pinks  (Zone 3)
Frilly, white, fragrant flowers swirl above the spiky grass-like light green foliage. This plant blooms intermittently all summer long! It prefers full sun and average to drier soils. It is a smaller variety, as the foliage grows only 4-6" tall and the flowers reach just a little higher. Use in the front of the border or in containers and troughs.
..............Available in 1-Quart only.

Dianthus barbatus
Sweet William  (Zone 3)
Although this classic plant is technically a biennial, it seeds itself well enough to provide a reliable source of new seedlings for the garden. These tough plants grow to between 6-12" and bloom in Early season. Depending on the selection you choose, the flowers are either singles or doubles, mostly in shades of red, pink, and white. The blooms are flat-topped, fragrant clusters that make excellent cut flowers. We offer two types – the Single Midget Mixed and the Double Midget Mixed. Excellent plants for the rock garden, and front of the border.
...............Available in 1-Quart only.

Dianthus caryophyllus
Hardy Carnation  (Zone 5)
These Dianthus are the true Carnations which are used in the greenhouse industry for corsages and cut flowers. They usually require warm greenhouse conditions to grow and flourish. They bloom in Early to Mid-season on 18" plants, with several colors available. They prefer full sun, well-drained average soil. Deadhead for prolonged bloom. We offer the following individual colors:
                            Dark Red,     Pink,     Red,     White,     Yellow,     or Mixed.
...............All are available in 1-Quart only.

Dianthus ‘Cranberry Ice’ (PP18342)
Garden Pinks  (Zone 5)
From the Dessert series of Dianthus from Plant Haven, Fragrant deep magenta flowers have rosy pink splotches on the center of each petal. Serrated edges on the petals give it a frilly look. Flowers bloom from May through July. Plants grow to 6" in full sun and well-drained soil.
...............All are available in 1-Quart and IMPACT containers.
 

Dianthus Raspberry Swirl (PP14377) ('Devon Siskin')
Garden Pinks (Zone 5)
This plant has been known by several names. Along with ‘Raspberry Swirl’, it has also been known as `Siskin Clock’ and looks very similar to `Laced Hero’ that we used to offer. This name, however, suits it best. White centers are surrounded by a band of deep raspberry. The color of the band then bleeds out into the white petals that are edged with a lighter shade of raspberry. The end result of all of this color swirling is a beautiful plant with blue-green foliage and darling flowers. It grows 12" tall when in flower, and 6" when just foliage.
...............Available in 1-Quart only.

Dianthus 'Strawberry Sorbet' (PP18338)
Garden Pinks (Zone 5)
Deep pinkish red flowers have lighter pink edges and serrated petals. This is the newest introduction in the Dessert series of Dianthus from Plant Haven. Foliage is blue green and has good disease resistance. Mound forming habit grows 6" tall and can spread 12". Plants prefer full sun and good drainage.

 

Dianthus deltoides ‘Arctic Fire’
Maiden Pinks  (Zone 4)
This groundcover-type dianthus grows to 7" tall and is a bicolor selection of the low-growing maiden pinks. ‘Arctic Fire’ is unusual in that is has very attractive white blooms with a red eye. Like other D. deltoides cultivars it likes full sun, excellent drainage and a soil with a slightly alkaline pH. Plants bloom in Mid-summer and will periodically rebloom through the summer if cut back after the initial flush of bloom. Trimming back the flowers of any low growing Dianthus variety after blooming will promote more lush growth and rebloom.
...............Available in IMPACT container only.
 

Dianthus deltoides ‘Brilliant’
Maiden Pinks  (Zone 4)
An excellent groundcover Dianthus that forms mats of attractive dark green to bronze foliage that grows to 6" tall. The flowers are a vibrant scarlet-red and appear in masses in early to mid-season. It is easy to grow in full sun and the usual well-drained soil and makes an excellent choice at the front of borders or along walkways in the garden.
...............Available in IMPACT container only.
 

Dianthus deltoides ‘Confetti Deep Red’
Maiden Pink  (Zone 2)
Part of the ‘Confetti’ series of improved selections, this cultivar is a new and improved ‘Flashing Light’. Deep green foliage is tinged with red and blooms with the same deep red flowers as ‘Flashing Light’. Grows up to 8" tall.
..............Available in 1-Quart and IMPACT containers.

Dianthus gratianopolitanus ‘Bath’s Pink’
Cheddar Pinks  (Zone 4)
Truly one of the best Dianthus cultivars available! ‘Bath’s Pink’ has soft pink-fringed flower petals with clean grayish-green foliage. This cultivar is a very heavy bloomer with peak bloom time in Early to Mid-season. When planted in full sun and well-drained soils it reaches 10" tall.
...............Available in 1-Quart and IMPACT containers.

Dianthus gratianopolitanus ‘Bewitched’ (PP13159)
Cheddar Pinks  (Zone 5)
This sport of 'Firewitch' has pink flowers with magenta rings, similar to Bath’s Pink. It has a long bloom time from early to mid season and reblooms again in fall. The foliage is icy blue, like 'Firewitch', and grows 6-8" in full sun. It is a spreading plant that slowly forms mats of foliage and flowers. Great for the front of the border, creeping over walls, or as an edging.
...............Available in 1-Quart only.
 

Dianthus gratianopolitanus ‘Firewitch’
Cheddar Pinks  (Zone 4)
This is another "must have" Dianthus selection. ‘Firewitch’ is a tough, 6" plant with unbelievable magenta blooms and blue-green foliage. An excellent low growing, clump forming selection blooming heaviest in Early to Mid-season with rebloom occurring periodically throughout the summer. An excellent choice for the perennial border. Like other Dianthus cultivars, plant in full sun and well-drained soils, and deadhead to promote continuous bloom. Voted the 2006 PPA Perennial Plant of the Year!
...............Available in 1-Quart and IMPACT containers.
 

Dianthus gratianopolitanus ‘Spotty’
Cheddar Pinks  (Zone 4)
Attractive, fragrant, red and white bicolor blooms makes ‘Spotty’ an eye-catching selection. This cultivar grows to 8" and blooms in Mid-season. It has similar cultural and landscape requirements as ‘Firewitch’ and ‘Tiny Rubies’. Try it – you won’t be disappointed!
...............Available in IMPACT container only.

Dianthus gratianopolitanus ‘Tiny Rubies’ 
Cheddar Pinks  (Zone 4)
This tough, durable groundcover has evergreen mounded foliage and beautiful, fragrant, double-pink flowers. ‘Tiny Rubies’ is a prostrate, clump forming selection that grows 4-6" and blooms in Early to Mid-season. The clump grows larger and larger each year forming a lush mat. A great plant for rock gardens, small spaces, edging, and when placed in the front of the border.
...............Available in 1-Quart only.

Dianthus ‘Mountain Mist’
Cottage Pinks  (Zone 4)
Another fantastic selection! ‘Mountain Mist’ has single, fringed, pink blooms in Mid-season over striking blue-gray foliage. The Perennial guru Dr. Allan Armitage refers to this plant as "the next great Dianthus." When planted in full to part-sun and average well-drained soil ‘Mountain Mist’ grows to 12".
...............Available in 1-Quart and IMPACT containers.

Dianthus ‘Pixie’ (PP13578)
Garden Pinks  (Zone 4)
Another winning selection in this rapidly improving genus! ‘Pixie’ has fragrant fringed flowers that are pink with darker pink accents and a red ring around the throat. If that is not enough, the plant is also a very long bloomer (Early to late-season) that continues to look good in its container for an exceptionally long shelf life. The silvery foliage holds up well in hot summers. Plants grow to 12" when in flower and perform best in full sun and a well-drained alkaline soil. A Blooms of Bressingham introduction.
...............Available in IMPACT container only.

Dianthus ‘Snowbank’
Garden Pinks  (Zone 4)
‘Snowbank’ is a superb Dianthus selection with double, fragrant, white flowers. The flowers bloom in Early to Mid-season on plants that grow to 18". The foliage remains evergreen throughout the winter. Plant in full sun and well-drained soil. Because of its white flowers, this selection combines well with many other perennials and is a great choice for the front of the border.
...............Available in 1-Quart only.

Dianthus Star Series:   

    Selections from this series were bred for exceptional plant vigor. They have continuous flowering, high bud counts, and compact mounding foliage.

Dianthus ‘Brilliant Star’ (PP13025)
Garden Pinks  (Zone 5)
Double-white flowers have deep crimson red centers and bloom from spring into fall! Blue-green foliage forms neat compact mounds that grow just 5" tall.
..............Available in 1-Quart only.

Dianthus Eastern Star (PP14437) ('Red Dwarf')
Alpine Dianthus  (Zone 4)
This beautiful member of the Star Series features showy silver-green foliage that is topped with hundreds of ruby-red flowers with dark burgundy centers. The flowers bloom from late spring until frost atop 8" tall plants. Plants perform best in full sun and a well-drained soil.
..............Available in IMPACT container only.

Dianthus Fire Star (PP14895) ('Devon Xera')
Alpine Dianthus (Zone 5)
As its’ name implies, this dianthus has fiery-red blooms with a deeper crimson eye that really stand out against the backdrop of gray-blue foliage. The flowers, which are fragrant, attract butterflies, and are good cut, bloom spring through fall. Grows 6-9" tall.  Best growth is achieved with a full sun site, and hot dry well-drained soils especially in winter.
..............Available in IMPACT container only.

Dianthus 'Neon Star' (PP14549)
Alpine Dianthus  (Zone 5)
This member of the Star Series was bred by Englishman John Whetman and introduced by Plant Haven. Shocking, neon-magenta flowers bloom atop compact 7" mounds of silver-blue foliage. Plants reach a spread of 7" and are heavily budded in spring. The flowers seem to never-end!
...............Available in 1-Quart and IMPACT containers.

Dianthus Shooting Star (PP16431) ('Devon Starling')
Alpine Dianthus  (Zone 5)
From the Whetman Star Series comes another great prolific flowering dianthus! Overlapping magenta flower petals have a unique plum center. The fragrant flowers bloom over compact evergreen mounds of wide blue-green foliage. Plant in full sun and well drained soil. With periodic deadheading you will enjoy copious numbers of flowers from spring to fall! Plants grow to 7" tall.
..............Available in IMPACT container only.  

Dianthus ‘Spangled Star’ (PP 13029)
Alpine Dianthus  (Zone 5)
Another stunning member of the ‘Star’ series, this cultivar is similar to D. ‘Spotty’ but with more consistent markings and brighter colors. Dark pink, almost red, flowers have pale-pink circular splotches on each petal. They bloom generously through the summer. The 8-10" tall mounds of gray-blue foliage stay almost evergreen throughout the year.
..............Available in 1-Quart and IMPACT containers.

Diascia integerrima Coral Canyon^TM
Hardy Diascia  (Zone 4)
An excellent selection from the good folks at The Denver Botanic Garden and Plant Select! This is an extremely long blooming plant with coral-pink flowers that have a darker red center. This is one of the longest blooming perennials we grow! If the flower show begins to diminish, simply give a light shearing and you will be rewarded with loads of new flowers! The fine textured soft-green foliage is nice complement to many other perennials. It grows to about 24" tall and the only real requirement we have discovered is a very well-drained soil in winter.
...............Available in 1-Quart and IMPACT containers.

Dicentra eximia
Fern-leaved Bleeding Heart  (Zone 3)
This plant exhibits skinny, heart-shaped flowers above the finely dissected fern-like foliage. It grows to 18" and prefers rich moist soil. Unlike Dicentra spectabilis, it does not go dormant and it will rebloom sporadically throughout the summer and early fall.
...............Available in 1-Quart only.
 

Dicentra ‘King of Hearts’
Bleeding Heart  (Zone 3)
This low-growing selection is perfect for containers or the front of the partially shaded woodland garden as it only reaches 10" tall! It features rosy-red flowers atop grayish-green foliage. It begins blooming in late May and continues throughout the summer. ‘King of Hearts’ does not go dormant in summer and is easy to grow in moist but well-drained soils.
..............Available in IMPACT container only.
 

Dicentra spectabilis
Bleeding Heart  (Zone 3)
This old-fashioned garden favorite is excellent for shade. Pink, heart-shaped blooms droop from the delicate arching stems above large, soft-green leaves. This plant prefers moist, rich soil and can grow to 24". This spring bloomer will go dormant in the summer so plant other perennials in close proximity to fill the gap this plant leaves later in the season.
...............Available in 1-Quart and IMPACT containers.

Dicentra spectabilis 'Gold Heart'
Gold Bleeding Heart (Zone 5)
This stunning introduction of our old-fashioned Bleeding Heart has bright golden foliage and the traditional rosy-pink flowers. The flowers appear mid to late spring on plants that reach 36" tall (when in flower) with a 24" foliage spread. Prefers part sun to shade with average well-drained garden soil. The flowers are great for cutting and also attract hummingbirds! Plants will go summer dormant, so plant some filler plants around them to help cover the open space. Bleeding Hearts can be left in the garden for many years with very little maintenance required. Protect from hard early spring frosts, otherwise flowers may be damaged.
..............Available in IMPACT container only.

Digitalis grandiflora 'Carillion' (aka D. ambigua)
Foxglove  (Zone 3)
This perennial foxglove is a strong performer in the garden. Large yellow flowers are spotted with brown on the inside and are produced on tall flower spikes in mid summer. Basal foliage is dark green and when in flower, plants grow 2-3 feet tall. They prefer part shade and average soils.
...............Available in 1-Quart only.

Digitalis 'Mertonensis'
Strawberry Foxglove  (Zone 4)
This vigorous hybrid was developed by crossing D. grandiflora and D. purpurea. A tetraploid, the thick, dark green leaves stay in a very neat rosette reaching 2’ wide and up to 2’ tall throughout the summer, and are topped off by 2’ flower stalks in June and July. The 2-3" long tubular flowers are a deep rose pink with burgundy spots borne in a 12" raceme. This plant will perform best in a moist, well-drained area in part shade. The flowers are excellent for cutting, and spent blooms should be kept pruned. We have found that the plant seems to survive winter much better when the foliage is not pruned until early March.
...............Available in 1-Quart and IMPACT containers.

Digitalis obscura Sunset Foxglove^TM
Sunset Foxglove  (Zone 5)
This Plant Select^TM selection for 2004 has unusual burnt sienna-colored trumpet-shaped flowers atop attractive willow-like foliage. This 20" tall, shrubby perennial grows best in full sun and requires a well-drained soil. It is great for the mixed border and also makes a wonderful cut flower!
..............Available in IMPACT container only.
 

Digitalis purpurea Excelsior Hybrids
Foxglove  (Zone 4)
These are garden hybrids of the European native Digitalis purpurea, the common foxglove. Foxgloves are classic, traditional plants for the garden with universal appeal. The Mid-season flowers in this series are mixed pastels in shades of salmon, pink, and white. Foxglove is not a true perennial; rather it is a biennial that prolifically self-seeds to provide the garden with a continual crop of seedlings for the next year’s bloom. After seeding, the old flower stalks should be removed to improve the plants’ appearance. Plant in a part shade area with ample moisture to support the 4’ flower spikes. The flowers usually last up to 4 weeks in the garden.
...............Available in 1-Quart only.

Digitalis Spice Island (PP17849)
Foxglove  (Zone 4)
An abundance of peachy-yellow flowers bloom in Mid to Late season on 4' tall evergreen plants. Plants require full sun to part shade with average moisture. The flowers are nice for cutting and also attract hummingbirds. Reported to be deer and rabbit resistant. 
..............Available in IMPACT container only.

Digitalis thapsi Spanish Peaks^TM
Foxglove  (Zone 4)
This true perennial foxglove was chosen by Plant Select^TM for its’ ease of growth in a wide range of soil conditions. Spanish Peaks^TM has beautiful pale-rose colored flowers atop pale green fuzzy foliage. It grows to 12" tall with a similar spread and performs best in full sun to part-shade. It is great for containers or the border and makes a great cut flower!
..............Available in IMPACT container only.  

Doronicum ‘Little Leo’
Leopard’s Bane  (Zone 4)
A bright spot in early spring! Semi-double sunny-yellow flowers grow 2-3" across and will surely get your attention during the rainy days of April! Grass-green heart-shaped leaves have scalloped edges. Grows 12-15" tall. Plants can go dormant in the summer.
..............Available in 1-Quart only.

Doronicum orientale 'Magnificum'
Leopard’s Bane  (Zone 4)
This is one of the great early blooming perennials. The 3", shiny yellow, daisy-like flowers begin in Early-season and last for several weeks. The lustrous, dark green foliage is deeply toothed and heart-shaped. This selection grows to 18-24" in full sun to part-shade with no particular soil requirements other than good drainage. Plants spread slowly by underground rhizomes to form scattered patches in the garden. Few other perennials have such vibrant yellow flowers and beautiful lustrous foliage that can rival this outstanding perennial!
...............Available in 1-Quart only.

Dracocephalum ruyschianum
Dragonhead  (Zone 3)
This little known perennial is a magnificent plant for the garden! Beautiful 1" purplish-blue flowers are produced in Mid-season. The narrow, dark green foliage is quite similar to that of Rosemary. Mature plants will grow 18-24" tall in sun to part-shade and are tolerant of harsh, drought-like conditions. We have had this plant growing in our display garden since the fall of 1997 and it has performed exceptionally well with little or no maintenance required – except for cutting the plant back to the next years basal shoots.  This tough plant deserves to be in your garden!
...............Available in 1-Quart only. Limited availability.