Violets (Viola species) include several cool-season annuals and perennials that are low-growing plants. These species are very shade tolerant and prefer lawns located on moist, fertile soils. Violets tend to be most visible during cool weather of spring and fall. Leaves of the common violet are oval to kidney-shaped with a heart-shaped base. Flowers may be white, blue, purple, or yellow. All violets reproduce by seed, and perennial violets also spread by creeping roots and rhizomes. The fleshy rhizomes full of stored energy combined with a thicker waxy cuticle on the leaf surface make this plant difficult to control.
To keep violets from invading lawns, maintain a thick lawn by using proper lawn care practices. (Mow high, mow often, and keep your blades sharp just to name a few.)