Generally speaking, you’ll want to avoid flush cuts, which are cuts made as extremely close to the trunk or main branch. These cuts can weaken your tree, lower its natural defense mechanisms, and even cause decay. You’ll also want to avoid tree topping, which is the total removal of the leader and upper main branches of a tree. 

Most pros will advise against either of these methods, which is why hiring a pro is often the best choice when it comes to tree trimming.

The best time to cut down a tree is during its dormant season, typically in winter or early spring, after all the leaves have fallen. Removing a tree during this period is advantageous for several reasons. Frozen ground helps secure the tree stump, protects the surrounding landscape from damage, and reduces the risk of the tree falling in an unintended direction. With the leaves gone, there is less risk of the tree's foliage getting tangled with other trees. Additionally, since this is often a slower season for tree services, you may be able to hire a professional at a lower rate. This dormant period is also the best time for tree trimming.

Generally, if your neighbor’s tree hangs over your yard, you can legally trim overhanging branches. Keep in mind that you cannot cross your property line to cut the trees, and if you damage the tree by trimming it, your neighbor could sue you. Depending on the type of tree and value, this could mean dishing out two to three times the value of the tree.

It’s worth noting that the specifics of this type of tree maintenance and the guidelines around it may vary by location. Do your research and, most importantly, consult with your neighbor.

Getting a tree pro with the right experience can be the difference between your transplanted tree surviving or not. When hiring a local tree transplanting and removal service, follow up on references, check their portfolio, ask for a breakdown of the costs, and get proof of liability and workers’ compensation insurance. 

Also, look for companies certified by the International Society of Arboriculture or registered with the Tree Care Industry Association and make sure they have an appropriate state or city license.