Giant Swallowtail
A pipevine swallowtail butterfly at Klingman's Dome, Smoky Mountains National Park, North Carolina
Flowers and first leaves of pawpaw tree (Asimina triloba) in forest of Shenandoah National Park in Virginia
Spicebush Swallowtail Butterfly Caterpillar (Papilio troilus)

Carolinian Zone

The Carolinian Zone in southern Ontario is a hotspot for biodiversity, with more species of rare plants and animals than anywhere else in Canada, including the Blanding’s turtle, southern flying squirrel, rusty-patched bumblebee and monarch butterfly.

Not only is the Carolinian Zone home to one-third of Canada’s at-risk plants and animals, it’s also home to a quarter of our human population. The region’s population is steadily increasing and so is its impact on nature, creating challenges for landscape planning, land management and balancing our ways of life with healthy ecosystems.

That’s why, if you live in the Carolinian Zone, your garden represents a critical opportunity to restore lost habitat and create a healthy future for the region and the wildlife that call it home. Please join us in making your garden part of the solution — together we can grow life-sustaining habitats and resilient landscapes, one yard at a time.

Map showing the location of 10 cities and 10 First Nations in southern Ontario with respect to the Carolinian zone ecoregion.
Overlapping with the traditional territories of the Anishinaabe, the Haudenosaunee, the Lunaapeew, the Wendat, the Mississauga and others, the Carolinian Zone is now home to most of Ontario’s large urban population centres as well as many First Nation communities (yellow dots) with historic ties and treaty rights to the land.

Get started today!

By planting a single native oak or milkweed patch or growing an entire native plant garden, you’ll be taking the first step to creating an ecosystem in your yard that offers food and shelter to a diversity of bees, caterpillars, butterflies and birds. Explore strategies for transforming your garden for native wildlife in the "Welcome Garden Guide."

The step-by-step guide "Four Seasons of Wildlife Gardening" allows you to start gardening at any point in the year. Just pick your starting season on the wheel and continue clockwise through your first year. You’ll find planning advice and seasonal activities that will make your garden thrive.

Want to find out which native plants are the best choices for your garden? Our "Planning a Wildlife Garden" helps by describing Carolinian Zone garden types (woodland, water and wildflower) and, for each one, listing easy-grow native plants, wildlife that your garden could attract and other benefits your garden will provide.