There are different types of Anemones. I think that the summer blooming ones are not winter hardy but don't quote me on that as I am not sure. The Anemone Blanda are called Windflowers and are fall planted for spring bloom. Then if they like the location, they come up year after year just like spring bulbs like daffs and crocus. Except they are not truely bulbs but who cares.
I plan to put mine out front where I have my Long Trumpet Daffodil mixture planted. Not sure if they will bloom under the daffs at the same time (they are very short) or bloom after the daffs are done. Either way is ok by me. I just want the spring color.
Debra, I didn't think this kind needed an excess of water as they go dormant after bloom just like a spring bulb.