My 'Becky' has been divided many, many times. She is almost too aggressive. However, I do really like how she pairs with various daylilies - in this photo, 'Scarlet Pansy' is in the foreground, 'Hyperion' behind Becky, and I believe 'Grecian Gown' to the left.

They look good with purple and blue. Salvia and Veronica look awesome with them too.

They also make good companion plants with liatris/gayfeather, stokesia & rose campion. The first two fall into the blue/purple spectrum; the rose campion has silvery foliage and deep, cranberry red flowers.

'lucky', I love that "Scarlet Pansy" lily with "Becky"...gorgeous.

Here is one of my "Beckys" with "Blue Paradise" phlox (picture taken today):

Rouge, that's gorgeous. My Blue Paradise is not blue at all this year.

I have daisies beside annual and perennial Rudbeckia. The whites and yellows are so warm and cheerful.

Martha

I really am trying to stop enlarging my gardens, as my advancing age is obviously slowing me down, but seeing rouge's Blue Paradise is so very, very tempting!