Some companies claim to sell black walnut tree clones developed at Purdue University; however, Purdue University no longer holds patent rights to these trees and cannot endorse the claims made for the ...

Black walnut is the most valuable individual tree in Indiana ... a series of thinnings will periodically reduce tree density, each time selecting the largest and best formed trees to remain. A ...

An iconic cottonwood tree in Walnut, Iowa, was cut down on Wednesday. According to the Iowa Department of Natural Resources, it was the third largest in the state. Mayor Brett Simpson said it was due ...