Add Yahoo as a preferred source to see more of our stories on Google. A pollarded willow tree - Thierry Hebbelinck/Getty Images Trees undoubtedly go through a number of changes, some of which are ...

At SUNY ESF's Pack Forest, researchers are thinning hemlock stands before a devastating invasive insect arrives.

Which branches — if any — should you be cutting off your young trees? You can't glue the wrong choices back on!

I planted some new trees this spring. What pruning should I be doing on those trees? A few pruning cuts on those new trees can make a big difference in how they develop into mature trees. Most trees ...