A minty-smelling creeping weed that spreads fast in shady, damp lawns and is tough to get rid of.

Square stems with round, scalloped, shiny leaves that give off a strong mint smell when crushed. It has small bluish-purple tubular flowers and spreads along the ground on runners. Often confused with wild violet, but violet has heart-shaped leaves, no square stem, and no mint smell.
Often mistaken for: Wild violet
Shows up and flowers in spring (April–May), but as a perennial it can spread and persist well beyond that.
Found in home lawns, especially shady, damp areas where turf is thin.

A low-growing clover that spreads by creeping stems and thrives in lawns that aren't getting enough nitrogen.

A cool-season weed grass that pops up bright green in winter lawns, then dies off and leaves bare patches by summer.

A low, spreading winter weed that thrives in thin, shady, damp lawns and spreads fast once it takes hold.

That familiar yellow-flowered weed with the deep taproot that keeps coming back if you don't out-compete it.