Wonderful picture, you really captured the gracefulness of the plant. I just acquired some of this plant in August. It was dug out from a large clump. I brought it home and within a few hours had it planted. Fairly soon after it started dying back. Do you think it is due to the shock of being transplanted? I am hoping it will ok next year.
I am sure the plant received quite a shock being separated and moved in August. However, these plants normally start to go into dormancy in September anyway, turning a lovely yellow color if kept watered. If dry, they just sort of look burnt orange and shriveled. So you will probably be okay. I would keep the soil moist, because the roots need to get established.
Thanks for your compliments about the photo. I am lucky to have a lot of these in my woods.