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You should not trim an oak tree in the summer. Oak trees are especially susceptible to disease, and open tree wounds are an invitation for beetles that carry tree-killing fungus. If there’s no risk that the oak tree will do damage to your property or hurt someone, it’s best to save the trimming for fall or winter. If you can, seal the wound with latex to prevent fungus from getting inside.

Depending on the severity of the damage, a tree might continue healing for years after a split or a break. Saplings can usually bounce back in the spring in one or two seasons, but larger trees might take a few years to regain their former strength. If your tree is showing strong growth and is not dropping limbs, you can consider it healed after the first two seasons.

Generally, homeowners do not need permission to cut down a tree on their own private property, but there are several exceptions where a permit may be required. You might need a permit if the tree is particularly large, old, or a protected species, such as a heritage tree. Trees located near public property or power lines can also be subject to special rules. Additionally, many local governments and homeowners associations (HOAs) have regulations controlling which trees can be removed to manage an area's appearance or prevent the spread of invasive species. To avoid hefty fines, it is crucial to check with your local government and HOA to determine if a permit is needed before you begin.

The felling notch you make before you make the final cut will determine which way the tree will fall. The cut will be in a wedge or triangle, and the tree will fall from the highest point of the triangle. You can use this, as well as the process described above, to estimate where a tree will fall.