Yes, there does seem to be some truth in advertising here. I should caution you that you will also have butterflies laying their eggs on Asclepias and as a result, the caterpillars will use your plants to munch on. But try to sacrifice a few leaves to have the eventual treat of more butterflies in the garden.
From Butterfly Bush to Butterfly Weed
From the Gardens of Barbara Sanders
From Marie Iannotti, About.com
Black Swallowtail Butterfly on Butterfly Weed
Photo Courtesy of Barbara Sanders©2009 About.com, a part of The New York Times Company.
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