how to landscape around blue spruces
I live next to a busy street and we have 11 blue spruces in 1 straight line in our backyard. I want to make the landscaping around the blue spruces more appealing. The only thing that I have now is limestone rocks that go straight around the perimeter. Should I place the rocks in a certain way to make it look better? What perennials would be good to put in for landscaping?