Eupatorium capillifolium

Dogfennel is in the Asteraceae family and it is native to Central and Eastern United States. The plant is toxic to both cows and horses but they normally avoid consumption. It grows well in poor soil fertility so it is recommended to get your soil tested and amend the soil if you are having an issue with this weed. Dogfennel also thrives in overgrazed areas, practices like rotational grazing can help with this issue and looking into your stocking rate can also be of benefit.

Hand weeding can be difficult as the plant will often reemerge if the taproot and rhizomes are not removed. 2,4-D and Dicamba both control Dogfennel. Multiple herbicides labeled for use in pastures contain one or more herbicides in addition to the ones listed above. Usage of these herbicides will also control beneficial clover. Always read the pesticide label as the label is the law. If you have any questions please contact your local Cooperative Extension Office.