Plants that ask for water while they root, then fend for themselves. Chosen for gardens on sand, slope, or full baking sun, these are the tough, sun-loving plants that flower hardest in the heat and shrug off a dry August once established.
'Tosca' is the offspring of a rare and deliberate cross, a marriage of Hibiscus paramutabilis, the regal, large-flowered species of southeastern China, with Hibiscus syriacus, the familiar Rose of Sharon of countless summer gardens. From that union comes a woody shrub that carries the best of both parents: the scale and drama of the Chinese species and the toughness and reliability of the old dooryard favorite.
'Pocomoke' is one of the smallest crape myrtles in cultivation, a dense, dwarf mound released by the U.S. National Arboretum in 1998 from the breeding program of Dr. Donald Egolf. A hybrid of the common crape myrtle (Lagerstroemia indica) and the Japanese species (Lagerstroemia fauriei), 'Pocomoke' belongs to the group of Arboretum introductions named for Native American tribes and rivers, and carries the deep rose-pink flowers that set the selection apart at such a tiny scale.
Few tender shrubs work as hard for as long as the lantanas, and Lantana camara 'Hybrida' distills the whole genus down to a single clear note of yellow. The species belongs to the verbena family, Verbenaceae, and hails from the West Indies and the warm reaches of Mexico south through tropical America, where the plant scrambles along roadsides and clearings in a haze of nectar and butterflies. The genus name is a borrowed one: Renaissance botanists lifted 'Lantana' from an old Latin name for the wayfaring tree, Viburnum lantana, whose domed flower clusters the lantana blooms happen to echo. The epithet camara is murkier, glossed variously as a vaulted chamber or a small boat, the true meaning long since lost to the record.
Few late-summer plants command a border like Leonotis leonurus, the lion's ear of the South African veld. Tall square stems, the signature of the mint family, Lamiaceae, rise five feet and more before breaking into tier upon tier of burnt-orange flowers, each whorl circling the stem like a ruff. The velvety, curved tubes are the source of both common names, lion's ear and lion's tail, and the botany agrees: Leonotis comes from the Greek for lion's ear, and leonurus for lion's tail.
Hardiness
Zones 8–11
Light
Full Sun
Height
4–6 ft.
Spread
2–4 ft.
Bloom
Orange
Plant type
Shrub
Traditional use
respiratory support, pain relief, topical applications, general wellness
Manfreda maculosa carries the rugged beauty of the American Southwest into the garden. Known by a string of evocative names, Texas tuberose, spice lily, and rattlesnake agave, this striking plant hails from the arid country of Texas and northern Mexico, where the spotted leaves and tall, aromatic flower stalks have caught the eye of gardeners and naturalists for generations.
Mascagnia macroptera, the butterfly vine, is a Mexican native climber grown for one of the most charming novelties in the plant world: seed pods shaped exactly like butterflies. Each pod is a pair of papery wings, chartreuse-green at first and drying to tan, so a vine in fruit looks as though a flock of little green and brown butterflies has settled among the leaves.
Few shrubs carry as much history as the oleander, grown around the Mediterranean and across the warm world since antiquity. The name Nerium traces to the Greek neros, meaning moist or watery, a nod to the streamsides and dry watercourses where oleander naturally takes hold, while the old name oleander seems to braid together olea, the olive, and the leathery, lance-shaped leaves the two plants share. Those dark green leaves stand in tidy whorls of three along long, sparingly branched stems, giving the shrub a poised, upright architecture even out of flower.
Nerium oleander has been grown around the Mediterranean since antiquity, the name Nerium drawn from the Greek neros, watery, for the streamsides where the shrub grows wild. 'Variegata' brings that ancient toughness together with luminous foliage: narrow, leathery leaves edged in creamy white around a deep green center, held in whorls along the stems so the whole shrub seems lightly frosted even when out of flower.
Nerium oleander is among the oldest shrubs in cultivation, grown around the Mediterranean since antiquity and named from the Greek neros, watery, for the streamsides and washes where oleander grows wild. The dark green, leathery, lance-shaped leaves sit in tidy whorls of three along long, sparingly branched stems, lending the shrub a clean, upright presence in every season.
Ptelea trifoliata, the hop tree or wafer ash, is a unique and underappreciated native, a small, bushy deciduous tree of eastern and central North America. Highly adaptable, the plant takes dry, rocky ground as readily as moist, well-drained sites, which makes the hop tree a fine choice for naturalized landscapes, pollinator gardens, and woodland edges.
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.
Salvia microphylla 'Deltoid' is a shrubby form of the littleleaf or baby sage grown for warm salmon-coral flowers and neat, triangular, deltoid leaves. The small tubular blooms open over a long season and read as a soft coral against the fine, glossy foliage, a gentler tone than the hot scarlet of many littleleaf sages.
Salvia microphylla 'Hot Lips' is the famous temperature-shifting bicolor of the littleleaf sages, and the trick is worth the fame. In the cool of spring the flowers may open pure white or pure red, but as summer heat builds they turn strikingly two-tone, white below with a bold red lip, so that a single plant can carry white, red, and red-and-white flowers all at once. The show runs from late spring until frost.
American basswood is one of the great shade and honey trees of eastern North America, a fast, stately deciduous tree with large, heart-shaped, softly toothed leaves and a broad, rounded, generous crown. Tilia americana has been cherished by Indigenous peoples, European settlers, and naturalists alike, and goes by a string of names: linden, bee tree, and lime, though the tree is no relation to the citrus lime. In late spring and early summer, hanging clusters of pale yellow, sweetly fragrant flowers open and hum with bees.
Hardiness
Zones 3–8
Light
Full Sun / Part Shade
Height
60–80 ft.
Spread
20–30 ft.
Bloom
Yellow
Plant type
Tree
Traditional use
mental & emotional well-being, respiratory support, digestive health
A tough, salt-defying seaside groundcover with a serious caveat. Vitex rotundifolia, best known as beach vitex, is a low, prostrate, trailing shrub of the mint family, native to the coasts of eastern Asia, the Pacific islands, and Australia, where the plant binds shifting sand along the shore. Rounded, blue-green leaves about two inches across clothe the running stems, aromatic and slightly spicy when crushed, and spikes of bright lavender-blue flowers open in late summer.
A native tree that bites back, and can numb a toothache. Zanthoxylum clava-herculis, the toothache tree or Hercules' club, is a small to medium deciduous tree of the citrus family, native along the coastal Southeast from Virginia to Florida and Texas. The genus name Zanthoxylum means yellow wood, and the species clava-herculis, the club of Hercules, names the stout, spiny, club-shaped trunk that is the tree's signature.
