Ohio’s sixth annual Why Trees Matter Forum, a look at the social, economic, and environmental benefits of trees in cities and suburbs, takes place Oct. 19 in Wooster. It’s for anyone interested in Ohio’s community forests, including landscapers, street-tree commissioners, plant nursery operators, local government officials, utility company workers, and economic and community development managers. OSU Extension (especially its Why Trees Matter Signature Program), Secrest Arboretum, OARDC, the Ohio Department of Natural Resources Division of Forestry, and The Davey Tree Expert Company are the sponsors. Register here by Oct. 14.