The Arboretum is part of a global network of Botanical Gardens and Arboreta working to educate the community we live in on a wide range of subjects related to habitat, species and resource conservation as well as sustainability practices. The plant collections include rare and endangered specimens from across the globe, some of which have conservation value, meaning they could be a link in a chain that could save a species from falling into extinction. Many specimens have been on the campus and cared for by District staff, students, and the greater community since the 1960’s and 70’s. They are as much a part of the campus experience as the buildings and employees who have been here for 30 years or more. The plant collections across the Palomar College District serve to create more than just an aesthetic environment. They also serve as an educational tool. And have been the basis for scientific study. In the last 10 years, many formal scientific studies have taken place at the San Marcos campus. SDSU, UCR, and the UC Cooperative Extension have or are currently conducting research on the property. Ranging from the study of soil, insects and the complex interconnectedness with the plants themselves.  

The Arboretum has a long history, with a great many people being involved and passionately dedicating time and resources. SD Zoo Global, Huntington Botanical Garden, SD Botanic Garden, The LA Arboretum, The Fullerton Arboretum, The National Tropical Botanic Garden, and the Honolulu Botanic Gardens are just a few institutions who have contributed to the plant collections over the years. Countless community members and local businesses have also contributed time, material and funding over the years. The Hunter Family and Hunter Industries are just one of many who have given a sizable monetary donation in recent years to help keep the Arboretum growing. Though more is needed.