Have you ever wondered or even worried about what is happening to your beautiful trees during the winter months? Especially if you have just planted new trees, it can be exceptionally worrisome that they cannot make it through winter. Do you worry your trees could freeze up, similar to unprotected water pipes? Or what if it gets below freezing? Does this cause our trees to die automatically? According to a study by Purdue University, if you have laid mulch around your trees in the shape of a volcano, the below-ground parts of the tree will be insulated. Also, soil and even snow keep the root systems insulated. The part of the tree you need to worry about during winter is the above-ground parts.