The plants that come back. Herbaceous perennials rise from the crown each spring, flower through the warm months, and retreat to the ground in winter, returning larger the year after. They are the flowering heart of the border, the long-term investment that repays a gardener season after season.
Phlox carolina 'Kim' is among the best of the Carolina phloxes, a selection found by the plantswoman Jan Midgley in Alabama and grown ever since for good health and honest flower power. From a low, tidy clump of narrow, almost lime-green leaves rise sturdy stems eighteen to twenty-four inches tall, each carrying an open, airy cluster of pale to bright pink flowers, five petals apiece, hovering just above the foliage from late spring into early summer. Where the border phloxes so often finish the season spotted and tired, 'Kim' holds clean, fresh foliage from spring straight through fall.
Where blunt mountain mint is all broad silver, Pycnanthemum tenuifolium is the slender cousin, a fine-textured native built from wiry stems and narrow, almost needle-thin leaves. From midsummer into early fall the plant clouds over with flat-topped clusters of tiny white to pale lavender flowers, faintly purple-speckled, and the effect at a distance is a low haze of bloom. What the flowers lack in size they make up in draw: bees, small butterflies, wasps, and beneficial insects work the nectar in numbers that make narrowleaf mountain mint one of the most valuable pollinator plants of the eastern flora.
Hardiness
Zones 6–9
Light
Full Sun / Part Shade
Height
2–3 ft.
Spread
2–3 ft.
Bloom
White
Plant type
Perennial
Traditional use
digestive health, general wellness, topical applications
Salvia 'Indigo Spires' is a big, free-flowering hybrid sage grown for the long, tapering wands of violet-blue bloom it throws from early summer straight through to frost. Each spike packs small, rich violet flowers tightly in whorls above dark, near-black calyces, and the spikes lengthen and curve as the season goes, so a settled clump reads as a haze of deep blue-purple for months on end. Few perennials give so much color for so long a run.
Symphyotrichum oblongifolium, the aromatic aster, saves the best of the season for last. Long after most perennials have folded, this tough native throws up a low, spreading mound of stiff, well-branched stems and buries the whole clump under small violet-blue daisies, each lit with a bright gold eye, from early fall well into November. The show arrives just as the garden goes quiet, and the flowers hum with the last bees and butterflies of the year.
The white-flowered form of swamp milkweed, Asclepias incarnata 'Ice Ballet' carries the same upright, well-mannered habit as the species but trades rosy pink for clusters of pure, cool white, held atop sturdy three-to-four-foot stems through summer. The effect is fresh and luminous in a moist border, and just as useful to wildlife.
Aromatic aster is the toughest and most fragrant of the fall asters, and 'Raydon's Favorite' is the classic selection. Aster oblongifolius 'Raydon's Favorite' forms a dense, rounded mound of small leaves that release a clean, balsam-like scent when brushed, and in early to mid fall vanishes under a haze of lavender-blue, gold-centered daisies.
Hibiscus grandiflorus, the swamp rose mallow, is a magnificent native perennial of the southeastern United States, grown for enormous soft-pink blooms and broad, velvety, gray-green leaves. Rising to eight or ten feet on stout stems, the plant brings a lush, almost tropical presence to the summer garden, at home in a wetland but just as striking in an ordinary bed or beside a pond.
Iris verna is one of those plants that feels like a secret, small, fragrant, and impossibly charming once noticed. Native to the pinewoods and sandy slopes of the eastern United States, this understated iris has been a spring companion for centuries, brightening forest floors long before gardeners thought to give the plant a place at home.
Monarda fistulosa, wild bergamot, is one of the great native perennials of the North American prairie, a hardy, aromatic member of the mint family loved for showy heads of lavender-pink and for a fragrance like oregano crossed with mint. The species grows wild in meadows, prairies, and open woods across most of the continent, and brings both vivid summer color and a deep well of history to the garden.
Wild blue phlox turned up in the Woodlanders catalog almost by insisting on it, growing in the woods around Aiken the way the plant has for as long as anyone can remember. We have watched these colonies for years, and taking this long to offer them is either a comment on our patience or on our woody bias. Possibly both.
Phlox pilosa, the downy or prairie phlox, is a native of open woods, prairies, and glades across much of the eastern and central United States, and 'Eco Happy Traveler' is one of the most rewarding garden selections, made for a spreading habit and a long run of clear rose-pink bloom. The soft, downy stems and narrow leaves give the plant the common name, and the whole low mat is topped in late spring by loose clusters of fragrant, five-petaled flowers.
Piloblephis rigida, wild or Florida pennyroyal, is a compact evergreen native mint from the sandy scrublands and pine flatwoods of Florida. The plant forms a low, tidy mound of fine, needle-like foliage that carries a clean, resinous, minty fragrance, released at a brush of the hand or on a warm afternoon in the sun.
Hardiness
Zones 8–10
Light
Full Sun
Height
1–2 ft.
Spread
2–3 ft.
Bloom
Purple
Plant type
Shrub
Traditional use
respiratory support, topical applications, general wellness
Polygonatum commutatum, the great or giant Solomon's seal, is a bold native perennial of the eastern North American woodlands, sending up tall, unbranched, gracefully arching stems clad in broad, oval, alternate leaves. From the leaf axils along the underside of each stem hang small, creamy-white, bell-shaped flowers, usually in pairs, in late spring and early summer.
Hardiness
Zones 3–8
Light
Part Shade / Full Shade
Height
3–5 ft.
Spread
1–2 ft.
Bloom
White
Plant type
Perennial
Traditional use
pain relief, digestive health, respiratory support, general wellness
Polygonatum odoratum 'Variegatum', the variegated Solomon's seal, is one of the most graceful of all shade perennials, an Old World cousin of the native Solomon's seals grown for luminous, cream-edged foliage on arching stems. Each lance-shaped leaf carries a soft green center rimmed and streaked in creamy white, and the new stems flush a warm rose before greening.
Hardiness
Zones 4–9
Light
Part Shade / Full Shade
Height
1–2 ft.
Spread
1–2 ft.
Bloom
White
Plant type
Perennial
Traditional use
respiratory support, pain relief, digestive health, general wellness
If any native perennial could be said to hum, the honor would go to Pycnanthemum muticum. From mid to late summer the blunt mountain mint gathers a shimmer of broad, silver-frosted bracts at the top of every stem, and within them open dense heads of tiny pink-to-white flowers that draw an almost comic density of life: bees of every kind, wasps, butterflies, skippers, moths, and flies working the nectar from dawn to dusk. In a three-year Penn State study that monitored eighty-six species, no plant drew a greater number and diversity of pollinators.
Salvia 'Phyllis Fancy' is a vigorous, large hybrid sage with a good pedigree, found as a chance seedling at the University of California, Santa Cruz Arboretum and named for a longtime volunteer there. The parentage is thought to involve Salvia leucantha, the Mexican bush sage, and possibly Salvia chiapensis, though the cross has never been confirmed.
'Cherry Queen' is a North Carolina-bred salvia from one of the most important salvia hybridizers America has produced. The cross is a deliberate one, between Salvia greggii, the autumn sage of the Texas and Mexican borderlands, prized for drought tolerance and a six-month bloom, and Salvia blepharophylla, a Mexican species whose name, eyelash-leaved sage, comes from the tiny fringe of hairs at the edge of each leaf (Greek blepharon, eyelash, and phylla, leaves). Blepharophylla carries the most saturated, signal-bright red flower in the whole genus, but the plant spreads by stolons in ways most gardeners do not want and resents cold winters, while greggii brings the bones and the durability. The breeder who put the two together was Dr. Richard "Rich" Dufresne of Candor, North Carolina, an organic chemist who became, more or less by accident, the leading American breeder of woody salvias for the eastern climate. Dufresne died in December 2018, leaving a body of work that includes 'Cherry Chief', 'Maraschino', and this selection, which Plant Delights Nursery called the most brilliant red they had ever seen on any hardy salvia.
Here is a salvia that wants what salvias are not supposed to want. Most of the genus comes from sunbaked Mediterranean hillsides, dry Mexican mountains, and dusty California chaparral, so that the very word Salvia is shorthand for full sun, gravelly soil, and a watering regime closer to neglect than care. Salvia koyamae, endemic to the cool wooded slopes of Honshu in Japan, breaks every rule, asking instead for shade, moist humus-rich woodland duff, and the cool morning light that filters through a deciduous canopy. This is, in short, the salvia to grow where hostas would otherwise go.
Salvia leucantha, the Mexican bush sage, is one of the great fall salvias, grown for arching wands of flower that seem spun from felt. Long spikes rise above the foliage in late summer and fall, densely packed with velvety purple calyces from which small white corollas emerge, a soft two-tone effect that catches low autumn light and holds for weeks. Few plants close the gardening year with such generous, easy color.
Salvia leucantha 'Midnight' is the all-purple form of the Mexican bush sage, and the difference is worth seeing. Where the common kind carries small white corollas against purple calyces, 'Midnight' drops the white altogether, so the long arching spikes read as pure, saturated purple from calyx to flower, a deeper and more solid color that carries even further across an autumn garden.
