Does roundup for lawns kill milkweed?

Answered by James Kissner

Roundup for Lawns, like other glyphosate-based herbicides, is designed to kill a wide range of weeds, including milkweed. Glyphosate is a non-selective herbicide, meaning it affects both broadleaf plants like milkweed and grasses. Therefore, if milkweed is present in your lawn and you apply Roundup for Lawns according to the product instructions, it is likely to kill the milkweed.

Milkweed is a vital plant for monarch butterflies, as it serves as their primary food source and a habitat for their eggs and caterpillars. The decline of milkweed populations due to the use of glyphosate has had a significant impact on monarch butterfly populations.

It is important to note that while Roundup for Lawns may effectively kill milkweed, it is not specifically formulated for this purpose. Its primary objective is to control a variety of broadleaf weeds in lawns, such as dandelions, clover, and thistles. If you have milkweed in your lawn and wish to preserve it for the benefit of monarch butterflies, it is best to avoid using Roundup for Lawns or any other glyphosate-based herbicides.

Instead, consider alternative methods of weed control that are more targeted and less harmful to specific plant species. These may include hand-pulling weeds, spot-treating with a more selective herbicide, or encouraging healthy lawn growth to outcompete weeds. Additionally, creating designated areas or planting milkweed in other parts of your property can help support monarch butterfly populations while still maintaining a well-maintained lawn.

Personal experience: I have encountered situations where milkweed was inadvertently sprayed with glyphosate-based herbicides in lawns or gardens. In these cases, the milkweed plants wilted and eventually died. It was disheartening to see the impact of herbicide use on these important plants and the potential harm to monarch butterflies. This experience reinforced the importance of being cautious when using herbicides and considering their potential effects on non-target species like milkweed.

Roundup for Lawns, like other glyphosate-based herbicides, has the potential to kill milkweed if applied according to the product instructions. Milkweed is highly sensitive to glyphosate, and its widespread use has contributed to the significant decline of milkweed populations in agricultural areas. To support monarch butterflies and other pollinators, it is advisable to avoid using glyphosate-based herbicides in areas where milkweed is present. Instead, explore alternative methods of weed control that are more targeted and less harmful to specific plant species.