California Blue Iris (Iris x germanica cv.). Hardy, spring-flowering rhizomatous perennialDescription: Very tall bearded iris bears large, fragrant, medium-blue flowers with lemon yellow beardsHabit: Vigorous, erect, clump-forming plants grow over 4 feet high; sp... - California Blue Iris (Iris x germanica cv.).
Canterbury Bells (Campanula medium). Description: Hardy biennial, ornamental flowerbears tall spikes of large, bell shaped, blue flowers in early summer; medium green foliageHabit: Flowering spike grows to 3 feet tall; clump forming; lush basal leavesCulture: Full sun ... - Canterbury Bells (Campanula medium).
Cardinal Flower (Lobelia cardinalis). Hardy, North American perennial Description: Brilliant scarlet-red flowers in summer to early autumn Habit: Flower spikes grow to 2-4 feet high from evergreen, 12-inch wide basal clumps of dark, glossy green foliage Culture: This sp... - Cardinal Flower (Lobelia cardinalis).
Cardoon (Cynara cardunculus). Perennial vegetable or ornamental plant Description: Spiny, gray-green foliage forms a large mound from which the tall flower stalks arise; the inedible, purple, thistle-like flowers in summer are smaller than those of its relative&... - Cardoon (Cynara cardunculus).
Carolina Silverbell (Halesia tetraptera syn. H. carolina). Spring-flowering, deciduous, North American treeDescription: White bell-shaped flowers in spring, soft yellow foliage in fallHabit: Grows 30-40 feet high and 20-35 feet wide; may be trained as large, multi-stemmed shrub or s... - Carolina Silverbell (Halesia tetraptera syn. H. carolina).
Cecile Brunner Rose (Rosa cv.). Hardy, deciduous, flowering shrub Description: Clusters of shell-pink blossoms produced freely from late spring through fall; lightly fragrant; smooth, dark green foliage Habit: Upright, compact shrub to 4 feet high and 3 fe... - Cecile Brunner Rose (Rosa cv.).
Charles de Mills Rose (Rosa gallica cv.). Hardy flowering shrub Description: Purplish crimson blooms in early summer are very double, often ?"quartered?" and showing a deep green eye when fully open; very fragrant; nearly thornlessHabit: Medium-sized shrub to 4 feet high and 5 feet w... - Charles de Mills Rose (Rosa gallica cv.).
Christmas Fern (Polystichum acrostichoides). Hardy, North American perennialDescription: Dark, leathery, evergreen fronds up to 5 inches across form a handsome groundcover with arching foliage Habit: Fronds reach 1-2 feet high; clumps grow up to 2 feet wide Culture: Prefers... - Christmas Fern (Polystichum acrostichoides).
Cinnamon Fern (Osmunda cinnamomea). Hardy, deciduous, Eastern North American perennial Description: Handsome, broadly lance-shaped sterile fronds and distinctive fertile fronds bearing a mass of cinnamon-brown spores at the top in spring Habit: Grows 2 to 3 feet hig... - Cinnamon Fern (Osmunda cinnamomea).
Cliff Stonecrop (Sedum glaucophyllum). Hardy, mid-Atlantic perennial groundcoverDescription: Glaucous blue-grey to light green, fleshy leaves form attractive rosettes that carpet the ground; miniature sprays of white flowers rise on 4" stems above the foliage in mid-late spri... - Cliff Stonecrop (Sedum glaucophyllum).
Climbing 'Cecile Brunner' Rose (Rosa x chinensis cv.). Hardy, deciduous, flowering shrub Description: Clusters of shell-pink blossoms produced freely throughout the summer; lightly fragrant; smooth, dark green foliage Habit: Upright, compact shrub to 4 feet high and 3 feet wide ... - Climbing 'Cecile Brunner' Rose (Rosa x chinensis cv.).
Climbing Hydrangea (Hydrangea anomala subsp. petiolaris). Hardy, climbing, woody vineDescription: Large, flat, sweetly-scented corymbs of white flowers bloom in early to midsummer; glossy dark green foliage stays green late into the fall Habit: Grows 30-50 feet high and 6-10 feet w... - Climbing Hydrangea (Hydrangea anomala subsp. petiolaris).
Cloth of Gold Crocus (Crocus angustifolius). Late winter-flowering, hardy bulb Description: Deep golden yellow flowers with three outer petals brushed mahogany Habit: Grows 3 to 6 inches high Culture: Prefers full sun and well-drained garden loam; plant bulbs 3-4 inches deep Hardiness:... - Cloth of Gold Crocus (Crocus angustifolius).
Cornelian Cherry (Cornus mas). Hardy shrub or small tree Description: Clusters of tiny golden yellow flowers appear before the leaves in early spring Habit: Reaches 20' high and wide, rounded shape Culture: Prefers part shade to full sun and well-drained soil, but is a... - Cornelian Cherry (Cornus mas).
Creek Sedge (Carex amphibola). Hardy, eastern North American perennial sedgeDescription: Fountain-shaped mounds of narrow, shiny green foliage; green seed clusters emerge in late spring; semi-evergreen in warmer zonesHabit: Grows 8-12 inches high and wide; clump-form... - Creek Sedge (Carex amphibola).
Cucumber Tree (Magnolia acuminata). Hardy, deciduous, North American treeDescription: Greenish-yellow, bell-shaped flowers appear with leaves in early spring. Cucumber-like fruits are green at first, and covered with purplish-red fruits in fall.Habit: Grows to... - Cucumber Tree (Magnolia acuminata).
Culver's Root, Virginia Speedwell (Veronicastrum virginicum). Herbaceous, North American perennialDescription: Tiny white flowers held in upright racemes in mid-summer; narrow leaves whorled around erect stems. Habit: Grows 4-7' feet high and 2-4' feet wide; spreads slowly by underground stolons. Culture:... - Culver's Root, Virginia Speedwell (Veronicastrum virginicum).
Delft Blue Hyacinth (Hyacinthus orientalis cv.). Early to mid-spring-flowering, hardy, pest-resistant bulbDescription: Large, single-flowered, highly-scented flowers in soft lilac-blueHabit: Flower height 8 to 12 inchesCulture: Plant bulbs 5 to 6 inches deep in well-prepare... - Delft Blue Hyacinth (Hyacinthus orientalis cv.).
Deodar Cedar (Cedrus deodara). Large, evergreen tree Description: Graceful, pyramidal outline with pendant or drooping, dark bluish-green needles and solitary, reddish brown cones Habit: Grows 40-70 feet high and 30-40 feet wide in 30-40 years Culture: P... - Deodar Cedar (Cedrus deodara).