Discussions on style, colour and preference form the basis for planting design. The can be in the form of plant lists or more detailed planting plans. Trees, hedging and specimen shrubs give a garden form and structure throughout the year. Flowering shrubs and herbaceous plants enrich a garden with colour, texture and scent. Planting schemes are devised and plants selected to give a long flowering season, scent, colour, and seasonal and visual interest as well as appropriateness to the site.