What kind of plants are Monarch butterflies attracted to?

Monarch butterflies are attracted to all types of native Milkweed. The female Monarch lays her eggs only on Milkweeds - plants in the Asclepias genus - where the caterpillars will hatch, feed and grow before forming a chrysalis. Adults also love Butterfly weed (a part of the Asclepias genus), Asters, Joe Pye weed and much of the same plants any other type of butterfly would enjoy.

More butterfly-friendly plants can be found here.