Buddhist pine (Podocarpus macrophyllus) is a slow-growing evergreen conifer native to southern Japan, southern and eastern China, Taiwan, and northern Myanmar, long prized in East Asian gardens and feng shui traditions. In mild climates it makes a handsome, dense column of strap-like dark-green foliage suitable for hedging, topiary, or a statement specimen; it also tolerates container culture well. The honest catch is its frost-tenderness: plants are reliable only from zone 7b (about -12 C) southward, and a late cold snap in zone 7 can kill established specimens to the ground. Layered on that is its pace - growth is genuinely slow, so a screening hedge planted today may take 15-20 years to reach useful height.

Cordyline australis is a dramatic, palm-like evergreen tree native to New Zealand, where it ranges from North Cape to the southern South Island. In warm-temperate gardens (USDA zones 8-11) it makes an unmistakable structural focal point with its stout trunk, arching sword-leaf crown, and spectacular fragrant flower panicles in late spring. The honest catch is its scale and tenderness: it can exceed 10 m in mild climates, its fibrous roots are expansive and difficult to remove, a single hard frost below about -5C (23F) can kill or badly damage an established specimen, and the saponin-bearing foliage is toxic to cats and dogs - making it a gamble outside sheltered coastal or urban sites in colder zone-8 gardens.

English yew (Taxus baccata) is a slow-growing, exceptionally long-lived evergreen conifer native across Europe (except Iceland), the Caucasus, Turkey eastward to northern Iran, and Morocco and Algeria in North Africa, valued for centuries as the definitive topiary and formal hedge tree. Its dense, dark-green needle foliage tolerates extreme shade and hard clipping, making it the premier structural plant for sculptured gardens. The honest catch is severe toxicity: nearly every part of the plant — needles, bark, seeds — contains cardiotoxic taxine alkaloids with no antidote, posing a lethal risk to humans, livestock, horses, and dogs; only the red fleshy aril is non-toxic, though the enclosed seed is deadly.

A broadleaf-evergreen citrus tree reaching 15-30 feet tall and wide, with glossy foliage, sharp thorns on its twigs, and highly fragrant white four-petaled flowers. The large fruit (over 3 inches across) ripens pale yellow, often patched with pink, over juicy flesh that ranges from near-white to deep red by cultivar. A subtropical tree hardy only to USDA zone 9a, it is grown outdoors across the citrus belt and as an overwintered container plant farther north.

Citrus reticulata is the mandarin orange, a small evergreen citrus tree originating from wild populations in South China and Vietnam (the Nanling Mountains region), where domestication occurred at least twice from distinct wild subspecies. In warm climates (USDA zones 9-11) it is a productive, fragrant garden tree bearing the familiar loose-skinned sweet fruits prized worldwide. The honest catch is frost-tenderness: even a light freeze damages the tree and kills young growth, so outside the deep South, coastal California, and Mediterranean climates, it can only be grown as a container plant brought indoors each winter -- a significant maintenance commitment that most gardeners underestimate.

A large tropical evergreen tree from Asia and northern Australia, where it can reach 30 feet or more with a broad, rounded crown of arching, weeping branches clothed in glossy, pointed, 2-4 inch leaves. Across most of the world, though, it is grown as one of the most popular indoor trees, kept to 5-10 feet in a pot and valued for its graceful weeping form and dense, shiny foliage. It is hardy outdoors only in frost-free climates (USDA 10a-12b); everywhere colder it is a houseplant. Its single most famous trait is dropping its leaves dramatically whenever it is moved, drafted, over- or under-watered, or otherwise stressed - a habit new owners often mistake for death. The milky white latex in its stems and leaves is mildly toxic if eaten and is a well-known skin and airborne allergen.