The grounds around the main house were intended from the beginning to be cultivated as a decorative space. The landscape was relatively barren when the house was built. As young trees were planted, wooden frames were placed over them to protect them from hungry or reckless horses and cattle roaming the streets. Gradually, a variety of plants, shrubs, and trees filled the landscape.
W.P.H. and Ida were both interested in conservation issues. The couple paid homage to environmental preservation by planting a variety of different tree specimens in their yard. According to notes Mamie left, the McFaddins had been among the first in Beaumont to plant palm trees.
After the home was turned into a museum, the yard was renovated to highlight various historical features. To restore the lawn to its original vigor, flower beds were raised, drainage improved, and the lawn replanted. The rose beds were revamped and now contain approximately 100 hybrid tea roses, and varieties of old garden roses continue to bloom in outlying beds. Many historical plantings still thrive, and new ones must meet established criteria of appropriateness.
Azaleas were replaced across the front of the house and around the perimeter of the gardens, bursting forth in color each spring. In addition, many varieties of blooming plants, bulbs, trees, and shrubs were added to enhance the beauty of the gardens year-round. Garden ornaments original to the house have been reconditioned and repositioned.
Two giant oaks, registered with the Louisiana Live Oak Society, are more than 100 years old. A family story tells that acorns gathered at the site of the Battle of San Jacinto, where young William McFaddin had been a guard to the wounded, were planted on the west side of the house and grew into the magnificent specimens which now shade the porte cochere.