Misconception #1: Milkweed is only useful to monarchs.

Despite their natural toxicity, Milkweeds are valuable to a variety of insect species. Butterflies, moths, bees, and wasps visit milkweeds for pollen and nectar. Studies show over two dozen insect species, including honey bees, bumble bees, large wasps, and butterflies, are important milkweed pollinators.

 

Misconception #2: You should not grow milkweed plants because they are dangerous to livestock, pets, or children.

While milkweed contains toxins, it rarely poses a significant threat to people or animals. The plant’s milky sap contains cardiac glycosides, which can be toxic if consumed in large quantities. A small taste is typically not fatal, but large quantities can be dangerous. Educate children about the plant’s toxicity and avoid contact with eyes after handling. Milkweed is generally not sought after by grazing livestock when other forage is available. If poisoning is suspected, seek medical attention.

 

 Misconception #3: Milkweed is an invasive weed.

Many milkweed species are native to North America and are beneficial wildflowers. They are not listed as noxious weeds by the federal government or any states. However, some species, like common milkweed (Asclepias syriaca), can be aggressive in garden settings. The invasiveness of any plant depends on its characteristics and where it is planted.

 

Misconception #4: Monarch caterpillars will eat more than milkweed.

Milkweed (genus Asclepias) is the only host plant for monarch caterpillars. Female monarchs lay their eggs exclusively on milkweeds, knowing their offspring can only eat these plants. Reports of egg-laying on non-native, invasive plants like swallow-worts result in caterpillar starvation. Other butterfly species with similar-looking caterpillars, like the Black Swallowtail, feed on different plants.