The Hampton Court flower show, now open, features one garden with "The County Flower of Sussex" the Round-headed Rampion. The BBC broadcast of the show available for a week or so at http://www.bbc.co.uk/iplayer/episode/b07k77wt/hampton-court-palace-flower-show-2016-episode-1 shows a couple of my pictures of this flower from my blog at https://sussexrambler.
In my own garden, Greater Bird's-foot-trefoil growing under and through a "Queen of Denmark" rose works for me.
For a diversity of wildlife, allowing wildflowers (weeds!) to grow in a formal garden brings great delight to nature lovers like me. Click on any picture to expand it. And if you know anyone looking for interesting public speakers on Natural History please invite them to see www.peterlovetttalks.co.uk