Photo Courtesy: Grande Prairie Environmental Science Educational Society (GPESES) Article continues below advertisement ↴ Grande Prairie Arbor Day Society established in 2002 and is made up of representatives from Swan City Rotary, City of Grande Prairie, Grande Prairie and Area Environmental Science Educational Society, Alberta Agriculture and Forestry, West Fraser and Canfor ● Our Mission: To create a legacy of beauty and awareness of trees and their value through development of groves in the community, ceremonial tree plants and delivery of seedlings. ● Each year a school is chosen to receive the ceremonial tree on the Thursday of the first full week in May.