As tree development changes with time, so must tree care.

Tree care is a long-term, low-intensity process.

Tree care is founded on the principles of plant health care.

Tree care applies general concepts to specific genotypes.

In tree care, an ounce of prevention is worth a pound of cure because we have limited ability to cure.

Good trees and tree care start with quality plants.
Tree selection is founded on “right plant, right place.”

Arboriculture treatments can have either positive benefits or negative consequences.

Tree health and hazard are related but not equivalent.

Arboriculture and forestry are related but not equivalent fields.

from Harris, Clark, and Matheny; Arboriculture: Integrated Management of Landscape Trees, Shrubs and Vines