I am looking to plant a low formal hedge (18- 24") around a bed that houses mainly, among other things, roses, foxglove, delphiniums, and hydrangea. The border edge ranges from full sun to bright shade (north facing wall) in my zone 7 garden. My main purpose in planting this border is to keep my Basset Hound from roaming through the bed and napping on my plants, but also to provide a nice edge and contrast. What shrub would you recommend to make this hedge? I like boxwood, but the growth is so slow, and I would like this to establish quickly without breaking the bank on plants. I don't mind more frequent prunings, as long the plant can tolerate a low height. Also, would you suggest using bare root shrubs? Evergreen shrubs preferred, but not necessarily a must.