It carries a parasite of Monarch Butterflies termed Ophryocystis elektroscirrha, or OE, which often can result in defects in the wings of Monarchs. As it doesn’t die again and might bloom late, the plant by itself can also confuse Monarchs by signaling a breeding period when it’s time emigrate. , https://thebookmarkplaza.com/story18336834/detailed-notes-on-are-milkweed-plants-annual-or-perennial