Something is killing Monarch butterflies.  There are a few butterfly farms out there that specialize in raising Monarch’s for sale. I think that those companies may be the key to helping to save the Monarch Butterfly.  Offering plants, like milkweed, to homeowners can give them the food plant that they need for their larva to survive and thrive in the United States before it makes its migration south each year.  Selling seeds and starter plants, could help the butterly as it struggles against pollution and natural habitat destruction. Here is the story on the Monarch Butterfly.