The tropics, grown against the odds. Sub-tropicals bring bold leaves, vivid flowers, and a whiff of the jungle to gardens well north of the frost line, thriving through a hot Southern summer and, with a little shelter, holding on through the cold.
True cardamom, Elettaria cardamomum, is a lush, aromatic member of the ginger family and the source of green cardamom, the ancient and costly spice traded for millennia along the Silk Road and across the Indian Ocean. Native to the humid, evergreen hill forests of southern India and Sri Lanka, the plant grows in the dappled shade of the understory, in deep, fertile, always-moist soil. Ranked historically among the most valuable spices in the world, cardamom carries a history as rich as the flavor.
Hardiness
Zones 8–10
Light
Part Shade / Full Shade
Height
6–12 ft.
Spread
3–6 ft.
Bloom
White
Plant type
Perennial
Traditional use
digestive health, respiratory support, general wellness
Firebush earns the name honestly. From late spring until the first frost, the arching branch tips carry tight clusters of slender tubular flowers in hot orange-red, each one a narrow torch held out for the hummingbirds and butterflies that work the plant from morning to dusk. The foliage plays along: new leaves and stems flush bronze to burgundy, the veins stained red, so that even between flushes of bloom the whole shrub reads warm. Few plants pull in as much winged traffic through the heat of a southern summer.
Called Philippine violet, though neither Philippine nor a violet, Barleria cristata is a showy subtropical shrub that saves its display for the close of the year, opening dark blue-violet, trumpet-shaped flowers through late summer and autumn when much of the garden is winding down. A perennial in zones 8 and 9 and a four-to-six-foot shrub in zone 10, native to India and Myanmar.
Hardiness
Zones 8–11
Light
Full Sun / Part Shade
Height
4–6 ft.
Spread
24–30 in.
Bloom
Blue
Plant type
Shrub
Traditional use
respiratory support, topical applications, pain relief, general wellness
Few plants announce themselves the way Cestrum nocturnum does, and never by daylight. Through the afternoon the shrub keeps to a quiet, almost ordinary green, the slender branches arching and half-climbing, the small tubular flowers furled and unremarkable. Then dusk arrives, the cream-green trumpets open, and the night-blooming jasmine releases a perfume so far-reaching that it carries across a whole garden on still, warm air.
The sour orange is grown across the warm world as an ornamental and even a street tree, and stands somewhat naturalized in Florida. The fruit is famous for marmalade and useful little else, since the flesh is fiercely sour and bitter, not for eating out of hand. This particular unnamed selection has a Woodlanders story: we propagated the tree from a single specimen found growing on the edge of an abandoned sandy field in a remote corner of Appling County, Georgia, with no house anywhere near. What drew us was the crop, abundant, large, and very showy, loose-skinned and easy to peel.
Clerodendrum indicum, the Turk's turban, is a bold, tropical-looking perennial that stages two very different shows in a single season. First come tall, nearly unbranched stems, ringed with long narrow leaves and topped in summer by great airy sprays of long-tubed white flowers, shooting outward like a burst of fireworks, which earns the plant its other names, tube flower and skyrocket. Then, as the blooms fade, the real surprise arrives.
The Sago Palm is not a palm at all. Cycas revoluta belongs to the cycads, an ancient line of seed-bearing gymnosperms far closer to conifers than to any true palm, and the feathered crown is a case of convergent evolution rather than kinship. Cycads carried this same architecture through the age of the dinosaurs, which is part of what lends the Sago Palm such a primeval presence in a modern garden.
Hardiness
Zones 8–10
Light
Full Sun / Part Shade
Height
6–10 ft.
Spread
5–8 ft.
Plant type
Cycad
Traditional use
digestive health, respiratory support, topical applications, heart support
In the forests of the Himalayan foothills and across monsoon Asia grows a fig of ancient bearing, Ficus roxburghii, known to botanists today as Ficus auriculata and to gardeners as the elephant-ear fig. This is no dainty exotic. In the tropics the plant makes a bold small tree; in the American South, where hard frost cuts back the top, the fig returns from the root each year as a heroic perennial, with a presence as memorable as a live oak draped in Spanish moss.
The shrimp plant earns the name honestly. The arching flower spikes are built of overlapping bronze-to-pink bracts, each one curved and shingled over the next, so that the whole drooping cluster reads unmistakably as the tail of a boiled shrimp. This is the soft pink form, gentler in color than the coppery-salmon type most people picture, and out of the bracts slip the true flowers: slender, white, two-lipped tubes freckled with maroon at the throat.
Cape honeysuckle is a rangy, vine-like evergreen shrub from southern Africa, grown for glossy, compound leaves like a trumpet vine's and, above all, for the showy clusters of orange to orange-red tubular flowers that hummingbirds and, in the wild, sunbirds cannot resist. A member of the trumpet-vine family, Bignoniaceae, the plant can be trained up a support, clipped into a loose informal hedge, or left to cascade over a wall or bank.
