Relative Time of Seedling Emergence - Weeds

Group 0

Winter Annuals and Biennials from previous year

Annual Broadleaf - Horseweed, Kochia, Field Pennycrest, Shepherd’s Purse

Biennial Thistles - Bull Thistle, Musk Thistle

Bromegrass Species-Group - Annual Downy Brome

Group 1

Early, Early, less than 75 GGD

Dandelion, Foxtail Barley, Prostrate Knotweed, Kochia, Russian Thistle, Annual Wild Mustard

Group 2

Early, less than 150 GGD

Annual Broadleaf - Common Lambsquarters, Common Sunflower, Pennsylvania Smartweed, Wild buckwheat, Giant Ragweed

Grasses - Perennial Quackgrass, Wild Oat

Group 3

Late Early, 150 - 300 GGD

Annual Broadleaf - Common Ragweed, Velvetleaf

Grasses - Wooly Cupgrass, Perennial Smooth Brome

Group 4

Early Mid

Broadleaf - Perennial Canada Thistle, Annual Common Cocklebur, Annual Redroot Pigweed

Grasses - Giant Foxtail

Group 5

Mid, 250 - 400 GGD

Perennial Broadleaf - Common Milkweed, Hemp Dogbane

Annual Grasses - Green Foxtail, Barnyard Grass, Yellow Foxtail, Wild Proso Millet

Group 6

Late Mid

Annual Broadleaf - Venice Mallow, Common Waterhemp, Eastern Black Nightshade

Grasses - Perennial Yellow Nutsedge

Group 7

Late, greater than 350 GGD

Perennial Broadleaf - Field Bindweed, Hedge Bindweed

Annual Grasses - Large Crabgrass, Fall Panicum, Witchgrass