Poison Hemlock (Conium maculatum) and Wild Parsnip (Pastinaca sativa) have reached developmental stages that place these weeds outside of effective management options in southwest Ohio. Wild parsnip is producing seeds while poison hemlock is in full bloom meaning seeds can still develop on plants that are cut or sprayed with an herbicide.
More from Buggy Joe - Poison Hemlock and Wild Parsnip: TOO LATE! | BYGL (osu.edu)