The Myth: While weeds are unsightly, they don't really pose a threat to your lawn. 

The Truth: Weeds that are allowed to grow compete with grass, flowers, and trees for water, light and nutrients in the soil. Many types of weeds grow at a rapid pace, and thus consume the resources other "good plants" need to grow. 

The Solution: Make sure to give your lawn everything it needs to grow strong and healthy, and when those weeds to peek through, make sure your mower can handle them!