Understory trees bridge the gap between the canopy and shrub layer, duplicating the natural structure of a forest and providing wildlife habitat. Small trees provide a sense of enclosure and a backdrop for the rest of the garden. Shrubs can be thought of as the walls of a garden room. Include them with understory trees to form an uninterrupted line that flows into the tree canopy. Shrubs can be used to screen unattractive views like driveways and service areas, even the neighbor's trash cans.
Shrubs provide privacy and can be used to create secluded nooks and woodland hideaways.
Planting a massing of shrubs at the curve of a path can create an air of mystery. Color and Texture Color can be used to change the atmosphere of the shade garden. Warm colors such as yellow and red will brighten the area and make it feel warmer. Masses of warm-colored flowers also make a space appear smaller than it actually is. Shade gardens planted with cool colors such as pale pink, white, green and violet will give the impression of coolness and make the garden appear larger.