Their ongoing efforts have tapped residents, especially DeSantis, for more and more help over the decades. Just before his next fall planting season gets underway, he’ll turn 58, marking 41 years since his first tree took root. In 2019, TreeBaltimore will put 2,000 new root balls into the ground, and its crew of community and nonprofit collaborators will add thousands more. Organizations will be looking for volunteers to dig those big holes. And, as always, DeSantis will be there, pick in hand, breathing in the fresh air.