The answer to 'why is my grass invasive plants' is that your lawn is likely being overrun by weeds or other unwanted vegetation. Invasive plants can crowd out your desired grass, resulting in an uneven, patchy lawn. Common causes include poor soil quality, lack of proper lawn care, or the introduction of aggressive weed species.
Symptoms of an invasive plant problem include the appearance of thick, fast-growing plants that are not your intended grass, as well as bare or discolored patches in your lawn. To address this issue, you'll need to identify the specific invasive plants and take steps to remove them and improve the health of your grass. This may involve aerating the soil, overseeding, and applying targeted herbicides or manual removal, depending on the situation.