I intend to design and begin a meditation garden this spring. I want to border the garden with tall perennial flowers which are five feet tall or higher. A link address would also be appreciated. Thanks!

I intend to design and begin a meditation garden this spring. I want to border the garden with tall perennial flowers which are five feet tall or higher. A link address would also be appreciated. Thanks!
Some Dahlias will grow large like a shrub. Forsythia bushes will get tall also. Sunflowers are the tallest “flower” I can think of.
A combination of bushes and flowers of various heights might work best. Sounds like a great project.
Woolly thyme is a great ground cover that smells wonderful and can be used as a path or sitting spot. I like to trim mine into shapes such as hearts or circles
http://www.living-gardens.com/landscape-design-services/meditation-gardens.htm
i live in PA so my answers will be based on plants that grow in the northeast US zone 6.
Switch grass will grow 5′-6′ tall and makes a good screen. Cup plant can also grow tall http://www.wildflower.org/plants/result.php?id_plant=SIPE2
thinleaf sunflower http://www.wildflower.org/plants/result.php?id_plant=HEDE