What to put with primrose for the summer

Question

Could you give me some suggestions for blue or purple perennials for the summer please? The primrose seem to be taking up a lot of space so I’m guessing that the summer perennials need to be fairly upright with a very small spread.

Answer 1

This article should give you some ideas: https://www.gardeningknowhow.com/special/spaces/designing-blue-colored-gardens.htm