He said that Swinton had demonstrated empathy for others in need.
"Courtney Mae was a girl of great soul, of deep caring," he said. "She felt the universal suffering of others."
The tree-planting ceremony will begin at 1 p.m. on the grounds of the Warren County Cooperative Extension, 77 Schroon River Road in Warrensburg. An informal reception is to follow.
There will be brief presentations by Swinton's mother, plus a close friend of the family, and Amy Molloy, of the American Foundation for Suicide Prevention. The tree will be planted with the help of Swinton's friends and family, event co-organizer Jamie Thackrah-Harris said.
"We really hope that young people who knew Courtney, or are struggling themselves, will want to attend," she said. "We need to be there for each other."