First Lady Nellie Connally (1963-1969) oversaw an extensive landscaping project. Her plan established a formal design for plantings as well as arbors and a courtyard. The Connally Gardens contain a reflecting pool, a colonial arbor and colonnade, and brick walkways.

Today, the grounds of the two-acre Mansion complex are enclosed with brick and wrought iron fences and are used extensively for entertaining. A replica of the 1870s gazebo, or summerhouse, is constructed on the south lawn. Areas on the north side of the Mansion have been designated for small herb and vegetable gardens. Alive with seasonal color, the grounds provide a perfect setting for the Mansion.