Therapeutic Horticulture Incredible Edible Knowsley works with Adult Social Care and other services to provide a person centered approach by using therapeutic horticulture to individuals needing support. For more information please see the Therapeutic Horticulture page. Volunteering Individuals to come and volunteer with us in a number of ways. Please see our Volunteering page for more information. Growing Tips Please check out our Growing Tips page for guidance on how to look after your plants.