Bevan was born and raised in Glen Echo, Maryland. He grew up in a household surrounded by plants: his father was a landscape designer, and his mother worked at the US Botanic Garden. After receiving a degree in economics from Wake Forest University, Bevan became interested in pursuing his father's occupation. He spent a year abroad in Japan studying Japanese gardens. He then studied conservation, organic farming, restoration, and bonsai at the National Tropical Botanic Garden. In 2013 Bevan received a Masters degree from George Washington University for a Masters of Professionalism in Sustainable Landscape Design. It is through this program that Bevan was introduced to Green Spring Gardens and fell in love with the plants, the people, and the quiet sense of place that it instills.