Here is a piece that gives a nice overview of the history, benefits and aspects of horticultural therapy. There is nothing new here but it provides a good background and summary of the topic. This article examines the link between gardening and spirituality.
A community garden for seniors has been created in Andover, MA, that will offer horticultural therapy as part of its services.
The New York Times recently published a long review of a two-acre organic farm in Garrison, N.Y., that brings recovering drug addicts and alcoholics from New York City together with nature in an attempt to heal them. The Renewal Farm is run by a N.Y. not-for-profit agency and the men who toil the soil live locally at St. Christopher’s Inn. The group believes that its approach of using farm work and vocational training to overcome addiction has been more successful than other approaches; under 5 percent of all inhabitants have tested positive or alcohol or drugs during their stay.