I was given some for my last garden which was in Belgium so lots of rain. Floppy horrors. Never again.
Now we're on the Atlantic coast with much less rain and occasional droughts and plenty of sunshine I see them in municipal plantings on roundabouts, in parks and along roadsides and sea fronts along with perovskia, carex buchannani, nandina domestica. They do stand up and wave about in the wind but, frankly, don't look any more interesting but they surely are low maintenance. They get cut back hard to look like bristle brushes in late winter/early spring.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
I do the same as @Berkley and cut them back by about a third when they start to flop - usually in early July, but otherwise anytime really. I do it every year and then cut them back fully in spring and they've always come back happy.
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Now we're on the Atlantic coast with much less rain and occasional droughts and plenty of sunshine I see them in municipal plantings on roundabouts, in parks and along roadsides and sea fronts along with perovskia, carex buchannani, nandina domestica. They do stand up and wave about in the wind but, frankly, don't look any more interesting but they surely are low maintenance. They get cut back hard to look like bristle brushes in late winter/early spring.