Answer: What a dilemma! The best solution would be to do something that looks very deliberate rather than like "something happened" -- and it will need to be something rather large and architectural looking in order to fit in with the trees. You might try placing a large, substantial and very attractive section of decorative trellis covered in a vine. This would continue screening the property line and yet hold its own weight visually. Try planting a sweet autumn or fall blooming clematis on it; this plant will bloom in sun or shade and can cover the trellis in one season. It blooms in the fall with fragrant white flowers over a long period and the bright green foliage should make a nice accent to the darker hemlocks. Alternatively you might try a small ornamental tree such as a redbud. This tree will tolerate sun or shade and has lovelypinkish purple blooms in very early spring. Ideally you would plant several of these, either three or five altogether so that they blend the "replacement" into a grouping thus making it less obvious that is what you have done. If you consider using a tree, make sure there is enough room for it in among the hemlocks. I hope this gives you some ideas.
Q&A Library Searching Tips