The answer to 'sod installation has weeds' is that weeds in new sod are a common problem caused by weed seeds present in the soil or sod itself. Symptoms include patchy growth, unsightly weeds, and an unhealthy lawn. To solve this, you'll need to act quickly to identify and remove the weeds before they spread further.
For minor weed issues, you may be able to remove them by hand or spot-treat with a selective herbicide. However, if the weed problem is severe or the sod was improperly installed, it's best to call in a professional landscaper. They can assess the situation, properly treat the weeds, and make recommendations to get your new lawn healthy and weed-free.