See also:

• Business: Agriculture and Forestry: Forestry  (698)
• Home: Gardening: Plants: Trees  (65)
• Science: Agriculture: Forestry: Urban Forestry  (9)

• ACRT Institute of Arboriculture and Urban Forestry - Training for the line clearing, tree care and urban forestry industry.
• Arboricultural Association - Promotes care and knowledge of trees in the UK. Details of activities, members, and journal.
• Arboricultural Information Exchange. - The AIE site (UK) has news, links and collections of resources for arboriculture.
• Arborist Site Discussion Group - A loose affiliation of volunteer tree working professionals that discuss the needs of tree care within the industry and answer questions for the general public.
• Asia Tree Preservation Ltd - ATP provides arboriculture training and vegetation management consulting in the south, southeast and eastern parts of Asia.
• The California Arborists Association - Membership information, details and timetables of activities and workshops.
• European Arboricultural Council - A forum for arboricultural organizations in Europe to liaise on research and education in tree establishment and improvement of working practices.
• Great Southern Tree Conference - Educational event devoted to tree selection, landscape, production, marketing and management issues in the Southern United States.
• Homeowner’s Guide to Safer Trees - Copiously illustrated account of how to examine trees for safety, what symptoms to look for, evaluating the findings and information on finding an arborist. [PDF]
• How to Hire an Arborist - Provides guidance on selecting a consulting arborist, who offers advice, or a full-service professional who possesses skills in planting, transplanting, pruning, fertilizing, pest management, disease diagnosis, tree removal and stump grinding.
• International Society of Arboriculture - Arboriculture On-line was developed to assist tree care professionals in developing and maintaining effective plant health care programs. Includes an extensive collection of urban forestry links.
• Mid-Atlantic Chapter, International Society of Arboriculture - information and links on trees and their care (arboriculture); resources for arborists
• National Arborist Association - The trade association of commercial tree care businesses. Site has information (for consumers and for professionals) and links on tree care practices and standards.
• Shigo on Tree Systems - A set of articles by Dr. Shigo on arboriculture, and on the growth of garden trees.
• Tree World - Provides an international arborist’s forum for discussion and information about trees with industry experts. Questions answered, participation for registered users.
• Wildtrees - Includes views on conservation of native trees for the environment.