Curly dock is a perennial broadleaf weed found throughout the United States. It is similar to red sorrel and typically grows in wet areas in the lawn, especially areas that receive regular irrigation.
It has a bright, shiny green, lance-shaped leaves that appear in the spring. In the summer and fall, the wavy puckered edges of the leaves are tinted a reddish purple. Small greenish flowers appear on a tall, narrow spike that arises from the center of the plant.
Curly dock has a large brownish taproot, that grows most actively during the same period as when grass is suffering from the stress of hot, dry weather which is typically when lawns receive additional irrigation, thus causing ideal growing conditions for the curly dock to develop.
Spot treat individual curly dock plants with a post emergence herbicide containing triclopyr or triclopyr + clopyralid, or one with 2,4-D, or mecoprop + 2,4-D + dicamba.
Curly dock can also be pulled by hand or dug up with a small spade. Remove all pieces of the root or it will re-sprout.