I live in Syracuse NY and have a retired couple that travel to go SCUBA diving often. They want to add some color and interest with as low maintenance plants as possible. Let me stress the low maintenance part. Almost every plant I brought up that would bring color to the party had some trimming, thinning, or fall trim down involved and they did not like it. They did like the idea of ornamental grasses so I will be using quite a few of those in clumps. I also may add some Alberta spruce for a different texture and height. Maybe some burning bushes as we have heavy clay soils. The front of the house is southern facing and receives full sun. What other plants can give me a texture/color to drive curb appeal but yet be low on the maintenance side? What are your 5 all star plants from zone 4?