When designing any plant bed, there are 3 main plants you'll want to focus on. Specimen plants (usually an ornamental tree), accent plants (roses or other shrub to provide color), and a key plant (larger tree/shrub to help house feel the right size).
Landscape your yard: effective strategies for beginner gardeners
Tropical garden planting. This large bed looks beautiful against the lawn. For a palette of warm-tones, combine large interesting foliage like cannas, elephant ear, and the spiky leaves of phormium (New Zealand flax) in shades of purple, green, and red.