The lifespan of an evergreen tree depends on the specific species and its growing conditions. Some evergreen trees can live for hundreds of years, while others have a shorter lifespan. For example, some species of pine tree can live for hundreds of years, while others may only live for 50-100 years. Factors that can influence the lifespan of an evergreen tree include the tree's location, soil conditions, and exposure to pests and diseases. Proper care, including regular watering and pruning, can also help to extend the lifespan of an evergreen tree.

Pruning an evergreen tree involves using the right tools, making precise cuts, and shaping the tree to maintain its natural appearance. Start by selecting the right tools for the job, such as pruning shears or loppers for small branches and a pruning saw for larger branches. When making cuts, be sure to cut branches at a slight angle, just above a bud or lateral branch. Avoid leaving a stub, as this can lead to disease. Remove any dead or damaged branches as close to the trunk as possible. To shape the tree, prune the top of the tree slightly higher than the sides to maintain a natural appearance. Regularly monitor the tree for any dead or damaged branches that need to be removed. Proper pruning techniques can help to maintain the health and appearance of the tree.