Sigh. This may be the last round of garden photos before I start talking about "winter interest"!
I've planted some purple liatris in the past but it hasn't bloomed yet (last year or this year). Not sure why as they should get enough sun in this area and they're blooming right now in other parts of my yard. I'll give them one more year before I pull them out.
Sedum 'Autumn Joy' is only just now starting to open its flowers, while euphorbia, bergenia and perennial geraniums are providing lots of vivid red fall foliage colours.
Here's this garden at other times of the year: