Naturalized vs. Native: Understanding the Difference in Vermont Gardens

If you spend time walking through Vermont’s forests, fields, or even your own backyard, you may notice plants that appear to belong, from wildflowers tucked along stone walls to grasses filling old pastures and shrubs alive with the hum of pollinators. Yet appearances can be deceiving: not all plants that seem at home in Vermont are genuinely native. Some are naturalized, having escaped cultivation and established themselves in the landscape, while others evolved here over millennia, forming intricate ecological relationships. Recognizing this distinction is essential for gardeners, landowners, and conservationists who aim to cultivate healthy ecosystems, support pollinator populations, and maintain biodiversity.

A native plant, by definition, is one that evolved in the Vermont region over thousands of years, coexisting with local soils, hydrology, climate, wildlife, and pollinators. Native species are deeply integrated into the ecological framework, providing not only nourishment in the form of nectar, pollen, seeds, and foliage, but also habitat for breeding, shelter, and overwintering. For example, milkweed (Asclepias syriaca) serves as the exclusive host plant for monarch butterfly larvae, supporting the continuation of this iconic species. Red osier dogwood (Cornus sericea) offers both striking winter stems and berries that sustain birds through the cold months, while Joe-Pye weed (Eutrochium purpureum) produces late-summer nectar critical for a range of pollinators. Even the state tree, sugar maple (Acer saccharum), contributes to Vermont’s ecological web by shaping forest structure, moderating soil conditions, and providing sap that supports diverse wildlife. Collectively, these native species form the backbone of resilient, functioning ecosystems.

In contrast, naturalized plants originate from regions outside Vermont, often Europe or Asia, and have escaped gardens, pastures, or agricultural areas to establish self-sustaining populations in the wild. Although they appear to integrate seamlessly into the landscape, these species did not co-evolve with local wildlife and thus often lack the nutritional or structural attributes required by native pollinators and other fauna. Examples in Vermont include Queen Anne’s lace (Daucus carota), a European meadow plant; chicory (Cichorium intybus), known for its vivid blue roadside blooms; daylilies (Hemerocallis fulva), common in old farmsteads and ditches; and dandelions (Taraxacum officinale), which have naturalized across nearly every ecosystem in the state. While some naturalized species coexist relatively harmlessly with native flora, others can become invasive, outcompeting indigenous plants and diminishing habitat quality and biodiversity.

Understanding the difference between native and naturalized species is not merely academic; it has direct implications for ecological function and pollinator support. Native plants typically provide superior nutritional value, offering nectar, pollen, and foliage tailored to the physiological needs of local insects. Naturalized plants may provide transient resources but often fail to sustain pollinators through critical life stages. Monarch butterflies, for instance, cannot survive without milkweed; no amount of dandelions or chicory can substitute for the specific chemical and structural cues milkweed provides. Beyond individual species, native plants support complex food webs, promoting higher insect diversity, bird abundance, and overall ecosystem resilience. In contrast, landscapes dominated by naturalized species tend to support fewer dependent species, creating simplified ecological networks. One might think of native plants as “whole foods” for the ecosystem, offering complete nourishment, whereas naturalized species are more akin to “snack foods”—intermittently appealing but insufficient for sustaining life over time.

For Vermont gardeners, this distinction translates into actionable strategies for designing landscapes that support both beauty and biodiversity. Complete removal of all naturalized plants is unnecessary; many, such as chicory or Queen Anne’s lace, can coexist without causing significant ecological harm. However, prioritizing natives in planting schemes ensures the garden functions as a true pollinator and wildlife habitat. Practical approaches include learning to identify native species using resources such as the Vermont Wildflower Society or local extension guides, gradually replacing invasive or naturalized species like Japanese barberry (Berberis thunbergii) with native shrubs such as viburnum or ninebark, and creating temporal diversity in blooms by layering spring, summer, and fall natives such as columbine (Aquilegia canadensis), goldenrod (Solidago spp.), and asters (Symphyotrichum spp.). Equally important is allowing naturally occurring native populations to thrive; sometimes the most impactful action a gardener can take is to resist mowing or removing a patch of milkweed or goldenrod, allowing it to support pollinators uninterrupted.

In conclusion, Vermont’s landscapes tell stories of both deep-rooted native species and long-settled naturalized plants. While both contribute to the visual richness of the state’s gardens and fields, prioritizing native species is the most effective step for restoring ecological balance and safeguarding pollinator populations. By cultivating an awareness of the origins and ecological roles of the plants around us, gardeners and landowners can make informed decisions that enhance biodiversity, strengthen ecosystem resilience, and provide sustenance for generations of wildlife. When you observe Queen Anne’s lace nodding beside milkweed, it becomes evident that only one of these species is truly of this place—and recognizing that distinction matters profoundly for the health of Vermont’s gardens and wild spaces.