Hortus Arboretum and Botanical Gardens

Rutherford B. Hayes Presidential Library & Museums

Houston Botanic Garden

International Peace Garden

International Peace Garden

Wethersfield Estate & Garden

Boyce Thompson Arboretum

Chihuahuan Desert Nature Center & Botanical Gardens (Chihuahuan Desert Research Institute)

Rhododendron Species Botanical Garden

Metroparks Toledo – Ellen Biddle Shipman Garden

Landcraft Garden Foundation