Has anyone tried growing the commom milkweed? We saw some in a field behind our home. They look so different from most of the plants in our yard. We always liked the look of the flowers and the bonus of attracting butterflies but I don't see them planted in yards. I braved poison ivy to dig out 5 small plants - couldn't get to the taller ones because of brambles and poison ivy but I think the smaller ones were attached by runners. So the question is am I making a huge mistake by planting these in our garden? Is this a running pest like mint or houttuynia?