The facility at 1575 Linden Drive was remodeled and expanded in 1983, providing additional classrooms, research laboratories, and offices. The original building joined 2 wings, Agronomy -- Moore Hall, and Horticulture Building. The expanded L wing, called Plant Sciences, forms a square. A courtyard, open to the sky, is at this building's center. The courtyard offers spring blooming rhododendrons and azaleas, wild flowers, a purple leaf beech tree the Horticulture Society retrieved from a nursery in Chicago in 1983, fruit trees, dwarf conifers and many other plantings for everyone to enjoy.

Construction of a new conservatory and teaching greenhouse was completed in 1998, at the intersection of Linden and Babcock Drives. Research by faculty and students is also conducted at the Walnut Street greenhouses on the corner of Walnut Street and Observatory Drive.

The 1983 building expansion was constructed on the site of the teaching gardens. Plans to replace these gardens began almost immediately and for the past 10 years, the Allen Centennial Gardens (located at 620 Babcock -- a block from Horticulture) have been evolving. Today the teaching gardens are not only an outdoor classroom, but a popular attraction for the novice and professional gardener. It is a popular location for many summer weddings, campus retirement receptions, and numerous visitors as the gardens are open from dawn to dusk, 7 days a week.

Several important supporting facilities are associated with the Department of Horticulture, including the University of Wisconsin Arboretum, the D.C. Smith Instructional Greenhouses, the O. J. Noer Turfgrass Center, the Arlington Horticultural Research Farm, and the Allen Centennial Gardens. Each of these are state of the art facilities contributing significantly to the research, teaching, and extension missions in the department.