Green fence: Living willow hedges are sustainable and aesthetically pleasing. They provide almost instant screening, even in winter. They establish very quickly after planting and create an attractive green hedge in as little as 2 months.
This is a photo of horticultural therapy in action at the Perkins school for the blind. This program could provide evidence that one doesn't need sight to experience the benefits of HT. The therapy may work by enhancing the other senses.