America's oldest living botanical garden features an 18th century farmstead, native plants, wildflower meadow, and wetland. Located in Philadelphia.

naturalistic area in New Hope features nearly hundreds of species of native plants, in a setting of picturesque woodlands, meadows, a pond and a creek. Information about gardening with native plants, visiting, educational programs, and events.

Wildflower and native plant gardens maintained by the Brandywine Conservancy, in a mission to preserve, protect and share natural resources of the Brandywine region. History, descriptions and photos through the seasons, and information about the seed program.

Descriptions, photos, history, and admission information for eclectically designed estate garden near Philadelphia.

This Bucks county facility includes a visitor center with interpretive exhibits, and indoor and outdoor wildlife viewing areas. Developed for education, preservation, and conservation. Information on the facilities and events.

Pleasure garden established by Milton Hershey, featuring many themed gardens, seasonal displays, unique trees, an outdoor butterfly house, and a large rose collection. Information about visiting, educational programs, and events.

Several hundred tree species planted in a riparian zone of the Erie park, serving as an educational facility. Tree fact sheets provided by student projects.

Horticultural display garden near Philadelphia created by Pierre duPont in 19th century. Visitor information, schedule of events, what's in bloom, history, education, and employment opportunities.

Pittsburgh institution with indoor and outdoor collections. History, photo tour of the gardens, database of species, and information about research, educational classes, and special exhibits and events.

The official arboretum of the Commonwealth of Pennsylvania, whose thousands of woody plants include many of Philadelphia's oldest, rarest, and largest trees, is set in a Victorian landscape garden of winding paths, streams, flowers and special garden areas.

Encompassing more than 300 acres of the college campus and exhibiting thousands of ornamental plant species, the arboretum displays trees, shrubs, vines and perennials. Overview of specialty gardens, and information about visiting and events.

Its 650-acre grounds near Philadelphia include a pinetum, a native woodland walk, and various flowering shrub and tree collections.