How This Popular Garden Plant May Spread Parasites That Harm Monarchs

For monarch butterflies in the eastern United States, life revolves around milkweed, a group of about 100 plants in the genus Asclepius that provide food, shelter and nectar for the iconic insects. During their annual migration to the their overwintering sites in the mountains of Mexico, millions of the butterflies float from milkweed to milkweed and other native flowers, on an epic 2,000-mile journey. But in recent years, things have gotten dicey for the orange and black lepidopteron on their journey.

https://www.smithsonianmag.com/smart-news/how-popular-garden-plant-may-spread-monarch-parasite-180970257/