Generally, you’ll want to prune back the trunk by 1 to 2 feet each year to promote bushy growth. Doing so concentrates vegetative buds closer to the bottom of the tree, where you can easily harvest fruit. For side shoots that are a year old, leave at least six leaves. 

Never remove more than 30% of a tree’s foliage during pruning—even if your tree is really overgrown. Removing this much foliage at a time could kill your tree.

Generally, avoid trimming trees in the summer (with the exception of pruning fruit trees as needed). Trees use a lot of energy in the summer, most of which is relegated to new growth. If you chop it too early, you could stunt the next season's growth. Again, when in doubt, do some research based on the specific tree type.

No. Most of the time, suckers are only a sign that the tree is experiencing stress. However, they can also be the canary in the coal mine, letting you know that something else is stressing your tree. If you have lots of suckers on your tree, calling in an arborist or a tree care expert is always a good call to determine the cause and develop a solution that de-stresses your tree.

Hiring an arborist or tree surgeon is usually more expensive than a standard tree company, but it is often worth the investment. Arborists have education and certifications that standard companies typically lack, leading to a more professional, expert-level service. Their expertise is particularly valuable for diseased or infested trees, as they can ensure safer removal and help prevent the issue from spreading. Additionally, arborists may be necessary for work near power lines, as uncertified companies are often not permitted to service these trees. If your goal is to preserve the health of your trees, an arborist is the best choice. Their services, such as stump grinding, are also performed with greater expertise to ensure a safe depth that won't cause your lawn to collapse over time.