National Arbor Day is currently celebrated on the last Friday of April in most U.S. states. Alabama considers the last full week of February to be Arbor Day. This is due to matching the date with the best times to plant a tree, a customary Arbor Day activity.
Arbor Day Foundation - This organization's website has links including descriptions of types of trees and companies helping the environment.
Go Plant a Tree! 5 Odd Facts about Arbor Day (Livescience.com)
How to Celebrate Arbor Day (Southern Group of State Foresters)
State Arbor Days (Arbor Day Foundation)
Tree and Nature Facts (Factretriever.com)
Some books and e-books in our collection related to trees include (selections: NF) :