Wild violets are an attractive flower that grows wild in shady, moist areas of your lawn. Typically, they are purple but can also be light blue and other colours. This is a plant that is difficult to kill. It can range in height from 2 to 12 inches. It has a dense, fibrous root system that makes it difficult to pull from your lawn area. The plant is a perennial and the leaves have a waxy coating. Although they thrive in moist conditions, they are drought tolerant, thus making it harder to eliminate them from lawns.
Treat the wild violets in the autumn months around mid-September to the middle of October. This gives you the best chance of eliminating or controlling them.
Spray a product containing glyphosate, dicamba or triclopyr to get rid of the wild violets. Be aware that it will also kill any other green vegetation that it touches.
Use a post-emergent broadleaved herbicide and follow the directions on the container. Make sure it specifically lists wild violets on its label as something it controls. You may have to apply this every year for it to effectively control the growth of wild violets, although it may not get rid of them permanently.
Since the leaves have a waxy coating, it allows chemicals to roll off the leaves, resulting in poor absorption. Look for a product with a spreader-sticker. It will allow the chemicals to adhere to the leaves better, resulting in a better chance of killing the wees.