Jim from Hillsboro, Tx writes
Gordons Ornamec 170 Grass Herbicide is not labeled to safely be applied to milkweed and will likely cause harm to it therefore we woud not advise applying in or around milkweed. For recommendations, we recommend contacting the Master Gardener Division with your County Extension Office for suggestions on a selective herbicide safe for Milkweed.
Answer last updated on: 08/12/2021