Pennsylvania is home to a vivid landscape from the speckled oak trees of Philadelphia to the water lilies of Lake Erie. When it comes to ornamental plants for your front and backyard, some are better suited to a controlled environment than others. Evergreens & Deciduous Trees When most people think of ornamental plant life, they imagine the intricately shaped shrubs that dot the many lawns of suburbia. These shrubs are most often referred to in the horticultural community as