The answer to 'why is my grass invasive plants' is that your grass may be overrun by weeds or other unwanted plants that are growing aggressively and crowding out your desired grass. This is a common issue that many homeowners face, especially if the lawn has not been properly maintained or if the soil conditions are not ideal for the type of grass you have planted.
Invasive plants can take over a lawn for several reasons, including poor soil quality, lack of nutrients, excessive moisture, or improper mowing and watering practices. These unwanted plants can spread quickly and outcompete the grass, resulting in a patchy, unattractive lawn. To address this issue, you'll need to identify the specific invasive plants and take steps to control or remove them, while also improving the overall health and vigor of your grass.