When designing your garden with annuals, give a lot of importance to flower color. Annuals flower and offer color for longer periods of time than other plant types, because they are constantly in bloom. For that reason, annuals are ideal for use in complex garden plans.
Planting in groupings is more attractive than planting in rows or thin lines. Arrange plantings so that the taller types of plants are toward the back and shorter types are in front. In an island bed, taller plants go in the center since the bed is seen from all sides. Random mixtures of like plants in different colors are usually less successful than groupings of one color plant contrasted with groupings of another color plant, in the color scheme you have chosen.
Keep design factors such as color, form, texture, and scale in mind, because annuals will perform their role in your garden design in a stable fashion that does not vary from week to week. Whatever your style, casual or formal, annuals are an excellent source for providing garden accents and are available in a wide range colors for stunning garden effects.