Floppy Milkweed Stems!
Last year, I planted out 2 Asclepias speciosa seedlings, and in early spring a couple came back in the pots I was growing them in, and I planted those out as well.
I planted them in full sun in my front yard, in lean soil (or so I think - I didn't enhance it in any way). They are about 2.5' tall, and the stems are practically lying on the ground. Can't figure out why. Maybe the soil is richer than I thought? Maybe overwatering? I don't water it much at all, though. And, A. speciosa is one that likes more water than some of the other milkweeds.
Any suggestions? Other than that, they look healthy, nice large leaves.