Type: Broadleaf perennial
Size: To 4 feet tall and 2 feet wide
Where It Grows: Landscape and garden areas in sun or shade
Appearance: Dock produces large, wavy-edge leaves and large seed heads covered with brown seeds.
Control: Mulch to prevent dock. Pull and dig up plants or treat with a postemergence herbicide.
Test Garden Tip: Each plant can produce up to 40,000 seeds that wait decades before sprouting.