Sometimes a large planter that is dramatic is all you need. This planter, coupled with the bedding plants behind, gives a dramatic focal point at the end of a pool that can be seen from all angles. Bright mixes of color cascade from the base while the tropical palm adds drama and height.
Hydrangea paniculata 'Limelight', large white blooms tinged with pale green; trailing Ivy at the base spills over the sides of the classy zinc planter boxes. Baltic Ivy (variegated creamy edge) would combine well too.
If you want to give a surprise factor in your home, pick a hydrangea color that is in contrast to your home and place them in a large vase. This would make your visitors immediately focus on the arrangement and sooth their souls.