The Regional Garden features native plants of the Piedmont and coastal plain of the Mid-Atlantic region. The Piedmont, just east of the Appalachian Mountains, is filled with rolling hills and rock ridges
where bedrock and boulders poke through mostly clay soils. Here, large deciduous trees such as
tulip poplars, oaks, and lindens often dominate mature plant communities.
The Atlantic Seaboard fall line separates the Piedmont from the coastal plain, and is marked by
rivers carving through exposed bedrock. Near Washington, D.C., you can see the Potomac River
rushing over the rugged fall line at Great Falls National Park and at Little Falls near Chain
On this side of the fall line,
nutrient-poor, acidic soils of the coastal plain largely consist of sand
and silt. Different varieties of pines are more evident, especially where fire helps maintain
healthy plant communities. Many plants in the Regional Garden are adaptable and can be found
growing in both the Piedmont and coastal plain.