That's my favorite feature about these plants, that the blooms sway in the breeze!
I cut it down in winter (lost the one pictured below in the garden shot, probably a gopher fatality) and my second one is sending out bloom stems now. I have so many plants in those beds so I didn't notice but it's listed as Semi-deciduous.
I have a whole new area to plant now that my daughter and her family with their two large dogs finally moved out so I will be adding one or two more of these. Best wishes in your new garden!