The Marquand Foundation, established in 1954, supports planting and special maintenance programs to preserve the park as an arboretum for the public to enjoy. To that end, the Foundation has purchased or been given more than 100 species of trees and shrubs over the years. In addition, the Foundation maintains close relationships with the municipality of Princeton, which owns the park, to ensure proper routine maintenance and raise awareness, if special attention is needed to the condition of trees and shrubs.