Hi. I live in a tall dark brown corner unit townhome and looking for advice on how to layout the perrenials I have, and what other plants I should add to round out the design. It's the front yard and is basically a blank slate at this point. The space is 16W x 18L. The existing tree is a dogwood that buds white flowers in the Spring and that will stay. I purchasd 2 Otto Luyken Laurels, 3 Nandina Firepower, 2 False Spirea (astilbe), 2 Bleeding hearts, 3 Skimmia (1 male), 3 Euphorbia Martinii. I also plan to transplant Liriope and some Hostas from another area of my garden. How would you lay this out for the best curb appeal?