There are a few things you can do to prevent invasive roots. One is to keep the tree healthy and strong so that its roots don’t feel the need to search for food and water elsewhere. This means regular watering, fertilizing, and pruning. You can also install a physical barrier around the tree, like a wire fence or concrete wall. This will physically stop the roots from spreading into other areas. Finally, you can use chemicals like herbicides or root barriers to kill or stop the growth of roots.