Intenational Society of Arboriculture

A worldwide professional organization dedicated to fostering a greater appreciation for trees and to promoting research, technology, and the professional practice of arboriculture.

Tree and Neighbor Law

This website has been designed to provide information to help resolve liability concern, dispute and other legal requirements involving tree and neighbor law matters. 

Trees Are Good

Educational information about the benefits of trees and how to properly care for them in the urban environment. It provides a collection of reliable tree care information provided by industry organizations.

Tree Care Industry Association

TCIA develops programs, standards of tree care practice, and management information for tree and landscape firms. They also provide continuing education, training, conferences, and publications to promote the safe and appropriate practice of tree care.

American Association of Consulting Arborisits

ASCA represents Consulting Arborists—the authoritative experts on trees, and whose objective, comprehensive viewpoint ensures the safety, health, and preservation of trees. 

Friends of Trees

Friends of Trees works to bring people together to plant, care for, and learn about trees. They welcome individuals, families, and businesses throughout western Oregon and SW Washington to help restore and beautify the region.

The Bureau of Planning and Sustainability

The Bureau takes action to shape the future of Portland and advance climate protection for a more prosperous, healthy, equitable and resilient city.  It is a practical resources for a healthy and sustainable communities.

Garden Center Showplace

A resources for all types of of gardening, gardening supplies, plants, gardening tools, landscaping lawn care, water fountains, gazebos, patio furniture, in fact everything related to gardens and gardening.