Weeds with Purple Flowers (Common Lawn Weed Guide)

Weeds with Purple Flowers (Common Lawn Weed Guide). Most weeds are tenacious, but there are some common weeds with purple flowers that are especially aggressive when they invade lawns or flower beds. It’s also true that a purple flower weed such as wild violet can be attractive, but the problem with weeds is that they compete, often successfully, with more desirable plants for water, nutrients, and even sunlight.