Liatris spicata, also known as Blazing Star, is an unforgettable purple perennial. Known for its grass-like foliage and tall, spiky blooms that attract butterflies, birds and bees, Liatris makes a great cut flower and is deer resistant. Plant with Bee Balm and Black Eyed Susan’s for a vibrant, colorful garden. (Liatris spicata)
Beautiful design ... but I fear there's a lot of work here: keeping the edges crisp and the weeds from growing between the rocks (unless there is cardboard under them). It is quite inviting though, isn't it?
How to create beautiful shade garden pots using easy to grow plants with showy foliage and flowers. And plant lists for all 16 container planting designs! - A Piece Of Rainbow http://www.apieceofrainbow.com/16-colorful-shade-garden-pots/