Crabgrass thrives in lawns mowed shorter than 2 inches, and those watered frequently.

• In order to prevent it from growing, dig crabgrass before it seeds.

Dandelion is recognized by bright-yellow flowers and a large. They favor thin turf.

• We recommend that you pull or dig out young plants before they go to seed. Then cut any regrowth from leftover root pieces.

Dollarweed it reproduces by seed and tubers that grow at the root tips. Tubers often persist in the soil, making established plants difficult to control.

• We recommend to improve drainage and water less.
• Pull stems and roots of young plants.

Oxalis has cloverlike leaves and yellow flowers, each with five petals. Plants spread by roots and seed.

• This weed is difficult to control, and does best in thin turf watered frequently and lightly.
• Water thoroughly and fertilize properly.
• Dig out small plants

Quackgrass has a flat light-green to blue-green leaves. It spreads by seeds and aggressive underground stems, called rhizomes.

• Thoroughly dig out roots and pointed rhizomes—take out as much as you can because remaining pieces regenerate new plants.

Yellow nutsedge Also called yellow nut grass, it reproduces by seed and tubers that grow at the root tips. Tubers often persist in the soil, making established plants difficult to control.

• Mow high in early to midsummer and water infrequently though thoroughly.
• As with most weeds, control is easiest when plants are small.