The answer to 'why is my tree invasive plants' is that your tree may be harboring or spreading invasive plant species. Invasive plants can grow quickly and aggressively, often outcompeting native plants and disrupting the natural ecosystem around your tree. Common signs of invasive plants include dense ground cover, rapid growth, and the presence of non-native species.
To address this issue, you'll need to identify the specific invasive plants and take steps to remove them. This may involve manual removal, the use of herbicides, or other control methods. In some cases, you may need to consult with a professional landscaper or arborist to properly manage the invasive plants and protect your tree.