My front yard is dominated by two huge maple trees. I am frankly surprised that grass grows. Since I need to finally landscape the front a bit (there is nothing else in the front yard), what would be good to grow there? I would like to get some low (18" or so) evergreen bushes along the front of the house with perhaps some flowers in front of them for color. How much light would those evergreens need? I have about 30 linear feet to cover.