Trees often require pruning from the day they are planted into old age. While there are many reasons to prune trees, not all are effective or helpful. Pruning requires knowledge of trees, their physiology and growth, and responses to bud removal. Pruning should be frequent but strategic. For those that do not want to prune trees they will need to hire a tree pruning contractor (Arborist and tree worker). Selecting a qualified tree pruning contractor can be daunting. By understanding the basics, you can tell if your contractor is doing good work.