Question and Answer

How much has milkweed growth diminished?

Milkweed growth has decreased substantially in the Midwest over the past 10-20 years, especially in agricultural areas treated with herbicides. Some studies estimate the decline in milkweeds to be over 58% since 1999 (Pleasants and Oberhauser, 2013). As of 2014, only 1.34 billion milkweed stems remained from the estimated 2.2 billion milkweeds present in 1999 (Pleasants, 2016). 

Back to Frequently Asked Questions