Thank you! I will look into those research papers and at the MonarchRx project! I am monitoring for the IMMP this year again. If you read Agrawal’s book mentioned at the bottom of my post, you know that he does not think milkweed plantings are the solution to stop the demise of the monarch. I somewhat like it that he’s brave enough to go against the grain! I think the loss of contiguous habitat during migration is playing a very large factor, and this includes more plants than milkweed (perhaps some of the ones you mention, too). Thanks, again!