Short-Toothed Mountain Mint (Pycnanthemum muticum). Description: Hardy, North American perennial - White to violet-pink flowers in mid- to late summer; flowers highlighted by large, showy silvery bracts; oval, pointed, deep green leaves smell like spearmint when crushed Habit:... - Short-Toothed Mountain Mint (Pycnanthemum muticum).
Siberian Iris (Iris sibirica). Hardy herbaceous perennial Description: Showy, six-segmented flowers bloom in late spring; the 3 outer petals (falls) are beardless; the species flowers are shades of blue and purple; grass-like foliage Habit: 2- to 4-foot erect plants formin... - Siberian Iris (Iris sibirica).
Sideoats Grama (Bouteloua curtipendula). Hardy, perennial North American grassDescription: Showy, purplish, oat-like spikelets form on one side of the stem; green to blue-green basal foliage is golden brown fading to shades of purple and red-orange in the fallHabit: Bunc... - Sideoats Grama (Bouteloua curtipendula).
Single Musk Rose (Rosa moschata). Hardy, deciduous, spring-flowering shrubDescription: Large clusters of snowy white, single blossoms bloom in flushes throughout the season. Intensely fragrant. Shapely, pointed, slightly drooping leaves of rich, gr... - Single Musk Rose (Rosa moschata).
Small Yellow Foxglove (Digitalis lutea). Late-spring flowering perennialDescription: Tall, slender flower stems bear many charming, pale yellow, one-inch long flowersHabit: Flower stalks grow 2 to 3 feet tall above a basal mound of evergreen, strap-like, pale g... - Small Yellow Foxglove (Digitalis lutea).
Smooth Aster (Symphyotrichum laeve). Hardy, autumn-flowering perennialDescription: Clusters of small, pale lavender flowers with yellow centers rise above a clump of smooth, bluish-green leavesHabit: Grows up to 4 feet tall with many flowers on each stalkCulture: Toler... - Smooth Aster (Symphyotrichum laeve).
Smooth Penstemon (Penstemon digitalis). Hardy, North American perennialDescription: White, tubular, 5-lobed flowers with thin purple lines to guide pollinators cluster on spires in mid-late spring; leaves are elliptical at base, becoming lance-shaped further up stem... - Smooth Penstemon (Penstemon digitalis).
Snail Flower (Vigna caracalla). Tender late-summer to fall flowering vineDescription: Clusters of highly fragrant, white and purple flowers flushed with creamy yellow. Buds resemble a corkscrew or snail.Habit: Vines grow to 20 feet in summer or year-round in a greenhouse.Cult... - Snail Flower (Vigna caracalla).
Snowball Bush (Viburnum opulus roseum). Hardy deciduous shrub Description: Large balls of white blossoms in late spring or early summer; sterile flowers do not produce fruit; orange-red fall color Habit: Grows to 12 feet high and wide, but responds to pruning after flowers fade Cul... - Snowball Bush (Viburnum opulus roseum).
Snowberry (Symphoricarpos albus). Hardy, deciduous, North American shrub Description: Tiny pink blossoms in early summer followed by white berries which persist through the winter and are especially striking after the leaves drop Habit: Grows 4 to 6 feet high and wide Cul... - Snowberry (Symphoricarpos albus).
Solomon's Seal (Polygonatum biflorum). Spring-blooming, North American perennialDescription: Greenish white, bell-shaped flowers hang, evenly spaced, below arching stems, followed by deep blue berries; pairs of smooth, medium green leaves held parallel ... - Solomon's Seal (Polygonatum biflorum).
Sops of Wine Apple Tree (Malus cv.). Semi-dwarf, deciduous fruit tree. Description: Medium to large apples are greenish-yellow overlaid with some red; mild subacid, aromatic yellowish flesh; typically ripens in September.Habit: Grafted onto semi-dwarfing rootstock (MM111);... - Sops of Wine Apple Tree (Malus cv.).
Sourwood (Oxydendrum arboreum). Deciduous, native North American flowering tree Description: Fragrant, white, urn-shaped flowers cover the tree like a lacy veil in mid to late summer; lustrous dark green foliage turns yellow, purple, and brilliant red ... - Sourwood (Oxydendrum arboreum).
Southern Bayberry; Candleberry (Myrica cerifera (syn. Morella cerifera). Native, evergreen shrubDescription: Glossy, olive-green, foliage is aromatic when bruised; fragrant but non-showy flowers in late winter to early spring; small blue-gray, waxy-coated fruit persists through winterHabit: Grows 1... - Southern Bayberry; Candleberry (Myrica cerifera (syn. Morella cerifera).
Southern Magnolia (Magnolia grandiflora). North American evergreen treeDescription: Large fragrant white flowers in spring and lustrous dark green leaves which are downy and rust colored on the underside.Habit: Reaches 90' in height. Culture: Prefers sun or part shade and moist, loamy ... - Southern Magnolia (Magnolia grandiflora).
Southernwood (Artemisia abrotanum). Hardy, evergreen herb Description: Light to medium green, highly aromatic foliage is deeply divided into very fine, thread-like segments Habit: Shrubby plants grow 3-4 feet tall; responds well to pruning in early summer for a full&c... - Southernwood (Artemisia abrotanum).
Spiny Bear's Breeches (Acanthus spinosus). Hardy, herbaceous perennialDescription: Pure white flowers with purple bracts on 3' stalks, blooms in late spring to midsummer; shiny, dark green, deeply cut leaves with spiny margins Habit: Grows 4' high and 3' wide, ... - Spiny Bear's Breeches (Acanthus spinosus).