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Licensing requirements for arborists, also known as tree surgeons, vary by state and municipality. Many areas require a license, which often involves specialized education and experience. Even if not mandated, it's wise to hire a licensed professional as they tend to have more experience. Beyond licensing, look for certifications from organizations like the International Society of Arboriculture (ISA) or the Tree Care Industry Association (TCIA), as this indicates a higher level of expertise. Certified arborists must typically pass a comprehensive exam. Always confirm that the arborist has a business license and is fully insured to protect yourself from liability. Seeking positive recommendations from local homeowners is also a good step in finding a qualified professional.

On grafted trees, tree suckers will grow from the root stock, not the branches grafted onto it. Therefore, the leaves and characteristics of the suckers aren’t the same as the tree because they are different varieties. Root stock has more hardiness, strength, or drought tolerance than its grafted limbs, so if the suckers are from fruit or flowers, it might be different than the main part of your tree.

There are four common ways to prune a tree correctly: crown thinning, crown reduction, crown raising, and crown cleaning. The method you choose depends on the purpose of pruning. However, making the correct cuts is a vital part of the process, regardless of your method. Pruning incorrectly can damage or even kill the tree. So, you may want to hire a professional tree-trimming company to tackle the task. 

Most experts recommend removing a tree that has sustained more than 25% loss in the limbs, trunk, or circumference of the bark. Doing an initial trimming of damaged and dangling branches, but then waiting a few days of monitoring to decide how much more you might need to cut can help you better assess the total damage to the tree. However, consulting a tree maintenance pro to make this determination the best course of action before removing a tree.