Tip 1: Plan your garden bed before you start.
Plan before you plant, put plants together that have similar colors. It always looks best to have smaller plants/flower in front of the larger plants/flowers.
Tip 2: Location, Location, Location.
Different plants need different amounts of sunlight, choose you plants by the amount of sunlight your garden bed will receive, shade, part shade or full sun. Make sure you check the plant tag for light, watering and space recommendations.
Tip 3: Mix it up.
To keep your garden bed active all year round it is best to choose both perennials and annuals in your garden. Perennials will continue to grow year after year, while annuals will bring excitement and glamour during different seasons.
Keep these 3 tips in mind when your building your next garden bed and you will have a colorful and vibrant garden bed that changes all year round.
from Garden force http://www.gardenforce.co/3-tips-building-beautiful-flower-plant-beds/