Pruning is essential for maintaining tree health, but over pruning can harm your trees. Excessive removal of branches can reduce a tree's ability to photosynthesize (AKA its ability to produce food essentially starving tree) and can serverely weaken its structure, and make it more susceptible to disease and pests.

Its important to know how to prune trees, in way to minimize the damage being done to the tree. Improper pruning, such as leaving stubs will increase the chances of decay, since the tree cant seal over the pruning wound. Pruning too far will create an excess wound which is too big and will take too long to seal over.

So its important to find that sweet spot also know as Target Pruning

Topping is by far the worse , the practice is the result of cutting the main branches back to stubs, is highly detrimental. It can lead to weak branch structures, decay, and an increased risk of limb failure. Topped trees also tend to produce a flush of weak growth that is more susceptible to failure due to its weak attachment point.

Ignoring structural problems like co-dominant stems, weak branch unions, and cracks can lead to tree failure, posing an risk your property as well as people within the area. Regular inspections and structural pruning can be used mitigate these risks.

Planting trees too close to buildings, power lines, or other trees can lead to future problems. Always consider the mature size of a tree and ensure it has enough space to grow without causing conflicts.

Healthy trees require healthy soil. Ignoring soil compaction, pH levels, and nutrient content can lead to poor tree health. Regular soil testing and appropriate amendments can ensure your trees have the best possible growing conditions.

Mulch can be very good for trees, but too can be detrimental. When using mulch make sure to evenly spread it out so it doesn't create a mound like volcano surrounding the trunk, othewise with it will certainly kill the tree.