The answer to 'why is my grass weeds' is that your lawn is likely being overtaken by weeds due to a variety of factors, such as poor soil conditions, improper mowing, or lack of proper lawn care. Weeds thrive in areas where the grass is thin, the soil is compacted, or the nutrients are imbalanced.
Some common symptoms of a weed-infested lawn include patches of different-looking grass, the presence of broad-leaved weeds like dandelions or clover, and an overall uneven or patchy appearance. To address this issue, you'll need to identify the root cause and take appropriate steps to restore the health of your lawn.