For the current list of prohibited noxious weeds, see OAC 901:5-37-01. There is also a list of prohibited and restricted weed seeds, which can be found at OAC 901:5-27-06. The following plants are designated "prohibited noxious weeds":

• Apple of Peru (Nicandra physalodes)
• Canada thistle (Cirsium arvense)
• Columbus grass (Sorghum x almum)
• Cressleaf groundsel (Packera glabella (synonym Senecio glabellus))
• Field bindweed (Convolvulus arvensis)
• Forage Kochia (Bassia prostrata)
• Giant Hogweed (Heracleum mantegazzianum)
• Grapevines (Vitis spp.) when grown in groups of one hundred or more and not pruned, sprayed, cultivated, or otherwise maintained for two consecutive years.
• Hairy whitetop or ballcress (Lepidium appelianum)
• Heart-podded hoary cress (Lepidium draba sub. draba)
• Hedge bindweed (Calystegia sepium)
• Japanese knotweed (Polygonum cuspidatum (synonyms Reynoutria japonica & Fallopia japonica)
• Johnsongrass (Sorghum halepense)
• Kochia (Bassia scoparia (Kochia scoparia)
• Kudzu (Pueraria montana var. lobata)
• Leafy spurge (Euphorbia esula)
• Marestail (Conyza canadensis)
• Mile-A-Minute Weed (Persicaria perfoliata (synonyms Polygonum perfoliatum))
• Musk thistle (Carduus nutans)
• Palmer amaranth (Amaranthus palmeri)
• Perennial sowthistle (Sonchus arvensis)
• Poison hemlock (Conium maculatum)
• Purple loosestrife (Lythrum salicaria)
• Russian knapweed (Acroptilon repens)
• Russian thistle (Salsola Kali var. tenuifolia (synonym Salsola tragus L.))
• Serrated tussock (Nassella trichota)
• Shattercane (Sorghum bicolor)
• Common or Tall Waterhemp (Amaranthus tuberculatus (synonyms Amaranthus rudis)
• Wild parsnip (Pastinaca sativa)
• Yellow Groove Bamboo (Phyllostachys aureasculata)When the plant has spread from its original premise of planting and is not being maintained