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You can use herbicides to prevent roots from growing without killing the tree itself, however they must be used with caution. Systemic herbicides are absorbed by the root and can kill off problematic roots. However, herbicides can sometimes negatively impact nearby plants, so the solution is best used sparingly.

Yes, cutting a tree's roots can cause it to fall, particularly if major support roots are severed. In extreme cases, trimming roots can affect the tree's structure and stability. Many crucial roots are located just below the soil's surface. If you make severe cuts to roots more than 2 inches in diameter, you risk impacting the tree's water flow and its ability to withstand severe winds or storms. Even cutting roots less than half an inch in diameter under or outside the tree's canopy can cut off its water supply, causing it to decline, die, and eventually topple.

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.

It depends on where you live—but in most areas, leaves begin falling in September and continue falling until January or February. Warmer regions, such as Southern states, may see leaves fall a bit later in the calendar year. It also depends on the type of trees in your yard and their maturity.