The Frederick Law Olmsted Park and Arboretum was accredited in 2015 as a Level I Arboretum by the Moreton Register of Arboreta and the international ArbNet program.

Frederick Law Olmsted conceived of Stoneacre as a “parklike setting” with a variety of exotic trees to protect the Ellis family from viewers. Stoneacre was furnished with native and exotic trees including London Plane, Fern Leaf Beech, Japanese Maple, Zelkova, European Linden, English Oak, and Tulip Trees, as well as Silver Maple, Cucumber, and Sweet Gums. Manmade earthen forms and contours were designed to give a rolling and more interesting perspective to the overall site, which had been flat prior to Olmsted’s naturalistic design.