American Capital Holiday Tree
A site on past trees displayed in Washington, D.C.
Bugwood Christmas Tree Information
Several Christmas tree links from Bugwood.org
Christmas Trees and More
A Christmas tree site from University of Illinois Extension.
Christmas Tree Grades
A brief grading chart for trees.
Christmas Tree Pest Page
Great site from Cornell University on pests that attack Christmas trees.
Indoor Care of Christmas Trees
Tree care from Rutgers University.
National Christmas Tree Association
The American organization for Christmas tree producers.
Ohio Christmas Tree Producers Manual
A complete growers manual from Ohio State.
Retailing Guide for Christmas Trees
A guide on selling trees
Risk Assessment for Christmas Trees
An economic analysis of Christmas tree production.