Visitors entering the arboretum from County Road 100 North will be greeted by a diverse community of trees and shrubs. Along the east side of the road into the arboretum a sumac grove shelters a wide array of woody plants. The west side of the road is home to bald cypress, black ash, buttonbush, holly and speckled alder.In early spring, keep on the lookout for the fragrant white bottlebrush flowers of Fothergilla and the yellow blossoms on the Cornelian cherry trees.
The Gabis Arboretum at Purdue Northwest grounds become more formal at the Welcome Garden, which greets visitors with an ever-changing vista of color, shape and texture provided by an assembly of shrubs and perennials and blooming bulbs.
A grove of Virginia pine adjacent to the gravel parking lot offers shelter to a variety of understory plants including ferns, hemlock, hornbeam and dogwood trees. A grove of young Japanese Stewartia trees growing through a carpet of ferns and daylilies lines the northwest side of the walking path to the Meyer Pavilion.