Roman Chamomile (Chamaemelum nobile). Description: Hardy perennial herb - Small, single, white, daisy-like flowers in spring on low-growing plants; fragrant lacy foliage Habit: Plant forms a spreading mat up to 6 inches tall and 12 inches wide Culture: Prefers full sun ... - Roman Chamomile (Chamaemelum nobile).
Rose Geranium (Pelargonium graveolens). Tender perennial grown as a houseplantDescription: Deeply divided foliage with a strong rose fragrance; seasonal blooming in spring with sporadic blooms through summer in shades of pink with deeper pink veiningCulture: Prefers partial shade and moist... - Rose Geranium (Pelargonium graveolens).
Rose Vervain (Verbena canadensis). Description: Hardy, herbaceous perennial - Bears rich, deep purple clusters of flowers from spring until frost; deep green, scalloped foliage is semi-evergreen Habit: Low, spreading ground-cover 6"-12" high and 2'-3' wide Cu... - Rose Vervain (Verbena canadensis).
Rosemary (Rosmarinus officinalis). Tender, evergreen shrub Description: Wonderfully fragrant, needle-like foliage used as a culinary herb; pale lavender flowers appear along the stems in late spring Habit: Grows to 5 feet tall and 4 feet wide Culture: Prefers full sun and ... - Rosemary (Rosmarinus officinalis).
Royal Fern (Osmunda regalis). Description: Hardy, North American perennial - Deciduous fern producing dense clumps of broadly triangular, bright green fronds; produces brown or rust-colored, tassel-like fertile fronds in summer Habit: Grows to 3 to 5 feet tall C... - Royal Fern (Osmunda regalis).
Rusty Foxglove (Digitalis ferruginea). Summer-flowering perennial Description: Showy golden yellow-brown flowers with unusual rusty brown spotting and veining on the inside of the petals Habit: Flower stems grow to 5 feet high and 18 inches wide above its evergreen mound of dark green&com... - Rusty Foxglove (Digitalis ferruginea).
Saffron Crocus (Crocus sativus). Hardy, early to mid-fall flowering bulbDescription: Produces 1-5 widely opened, rich lilac flowers with dark purple veins on short stems; leaves are borne with or shortly after flowersHabit: Flowering stem 3-5 inches highCulture: Prefers ... - Saffron Crocus (Crocus sativus).
Salad Burnet (Sanguisorba minor). Hardy, perennial kitchen garden herb Description: Dark green, serrated foliage with a fresh cucumber-like flavor; the purplish-red flowers produce seed in late summer Habit: Mounded habit; grows up to 2 feet tall when in flower, a... - Salad Burnet (Sanguisorba minor).
Sarah Bernhardt Peony (Paeonia lactiflora cv.). Herbaceous, spring flowering perennial Description: Very large, fully-double, rose-pink blossoms, each petal has silver tips; late-season peony Habit: Grows 2 to 3 feet high and up to 3 feet wide; Medium height stems and dar... - Sarah Bernhardt Peony (Paeonia lactiflora cv.).
Sassafras (Sassafras albidum). Hardy, deciduous, Eastern North American tree Description: Clusters of greenish-yellow flowers appear on the branch ends of female trees in spring followed by bluish-black berries in the fall; aromatic, bright green leaves have thre... - Sassafras (Sassafras albidum).
Scarlet Geranium (Pelargonium inquinans). Tender perennial, grown as houseplantDescription: Velvety green foliage studded with clusters of bright scarlet flowers throughout the year.Habit: Grows into a 2 to 3 foot mound in the gardenCulture: Prefers full sun and rich, somewhat... - Scarlet Geranium (Pelargonium inquinans).
Sea Kale (Crambe maritima). Perennial culinary kitchen garden vegetable Description: Edible, bluish-green leaves emerge from the soil in early spring; showy, white, cruciform-shaped flowers developing by summer; attracts bees Habit: Foliage and dense flower ... - Sea Kale (Crambe maritima).
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).