Field maple

A dense, conical-to-narrow-pyramidal evergreen tree native to eastern and central North America, prized as a screening and foundation conifer. Flat, fan-like sprays of scale-like, aromatic yellow-green foliage clothe the tree from the ground up, and red-brown bark exfoliates on mature trunks. Wild trees can reach 40 to 60 feet but cultivated plants typically stay near 20 to 30 feet; small urn-shaped cones and dense evergreen cover make it valuable food and shelter for birds.

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 10°F) 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.

A large, long-lived deciduous forest tree of temperate and montane Europe, prized for its dense domed crown, smooth grey "elephant-skin" bark, and glossy leaves that emerge silky-edged in spring and turn warm russet in fall. POWO (Kew) records it as native from France, Germany and Great Britain east to Ukraine and south to Italy, Sicily and the Balkans. It is one of the great cathedral-canopy hardwoods of Europe and an unrivalled clipped formal hedge - but it is a true forest tree, not a small-garden specimen, and the honest catch is the shade it casts: very dense, with shallow, greedy roots, so little will grow beneath an open-grown beech.

Midland hawthorn (Crataegus laevigata), also called English hawthorn, is a thorny deciduous large shrub or small tree of western and central European woodland and old hedgerow, growing to about 15 to 26 feet with a dense, rounded crown. In late spring it is smothered in lax clusters of white (sometimes pink) flowers, followed by dark-red haws that persist into winter. It is one of the most wildlife-valuable hedge plants in the temperate garden - the Woodland Trust notes hawthorn can support hundreds of insect species and gives dense, thorny nesting cover - and the double pink cultivars ("Paul’s Scarlet") are longtime ornamentals. The honest catches: it is genuinely thorny, its seeds (like other rose-family stones) are not for eating, and it hybridises freely with common hawthorn (C. monogyna).

A native eastern + central North American multi-stemmed deciduous shrub with dentate (toothed) foliage, white spring flower clusters, blue-black drupes, and reliable fall color. Especially valued for wildlife - among the most-cited native shrubs for fall-migration bird forage.

Black elder (Sambucus nigra) is a fast, tough, wildlife-rich deciduous shrub native across Europe, north Africa and western Asia (POWO). It earns its place twice a year: broad flat creamy-white flower umbels scent the garden in early summer, then drooping clusters of small black berries ripen in late summer to feed birds in quantity. RHS gives the ornamental forms (e.g. "Black Lace") the Award of Garden Merit and rates the species fully hardy (H6). It is also one of the classic foraging shrubs - the flowers and the COOKED ripe berries are much-used for elderflower cordial and for elderberry syrup, wine and jam. The honest catch is real: the raw berries, and the leaves, bark, stems and roots, are toxic (cyanogenic glycosides) and cause nausea and vomiting, so berries must always be cooked and never eaten raw or unripe. Vigorous to the point of suckering and seeding about, elder is a wildlife and hedgerow plant first, an ornamental second.