Native vs Exotic Planting: The Twenty-First Century Debate
Should gardeners plant the species native to their region, the cultivars best adapted to garden conditions, or whatever they find beautiful regardless of origin? The native-vs-exotic debate has become one of the most contested questions in contemporary horticulture, with strong arguments and unexpected complications on both sides.
The pro-native argument
Native plants support native insects, which support native birds. The classic example: a UK oak supports around 250 insect species; an imported sycamore supports about 15. Native planting is the single most impactful action a gardener can take for biodiversity.
Doug Tallamy's influence
American entomologist Doug Tallamy's books (Bringing Nature Home, 2007; Nature's Best Hope, 2019) made the case that residential gardens — collectively the largest contiguous habitat in the United States — could support ecosystem function only if planted natively.
The pro-exotic argument
Many native species are aggressive thugs, unsuitable for small gardens. Many exotics provide longer flowering periods, more reliable performance and beauty unavailable from the local flora. Climate change is also moving the goalposts: yesterday's exotic may be tomorrow's necessary adaptation.
Defining 'native'
The harder question: native to when? Pre-1492? Pre-Roman? Pre-Ice Age? Many 'native' British plants arrived with the Romans or the Anglo-Saxons. Strict pre-historic nativism may be impossible to operationalise.
Climate change complications
As climate zones move north, the species that will thrive in central England in 2080 are largely Mediterranean species. The native argument may itself be undermined by the new climate reality.
The middle path
Most contemporary garden writers (Noel Kingsbury, Beth Chatto, James Hitchmough) advocate functional native planting in main planting areas, with carefully chosen exotics for ornamental effect — a hybrid approach defensible on both ecological and aesthetic grounds.
Where to see the debate
High Line (Oudolf's prairie-style mix is mostly non-native to NYC), Lurie Garden Chicago, Bringhurst Park Toronto, Pensthorpe (UK natives), Beth Chatto Gardens (climate-matched exotics).
Explore on the map
All of the gardens mentioned in this article are pinned on the interactive map. Use it to plan a route, group nearby sites into a single trip, or compare gardens by style and season.