We plant both "swamp" milkweed (Asclepias incarnata) and common milkweed (Asclepias syriaca) and the monarchs seem to vastly prefer the former for their babies.

We plant both "swamp" milkweed (Asclepias incarnata) and common milkweed (Asclepias syriaca) and the monarchs seem to vastly prefer the former for their babies. The one disadvantage, depending on how much you hate bugs, is that the swamp milkweed attracts a large variety of other polinators including various bees, flies, and some scary looking though harmless wasps[1]. [1] https://en.wikipedia.org/wiki/Sphex_ichneumoneus https://en.wikipedia.org/wiki/Sphex_ichneumoneus