|Japanese garden theme. Photo source: Landscape Design Advisor Media Director Flickr CC BY-ND 2.0|
Repetition of color, plant material, and shape, are used to create unity in this more formal symmetrical design. Photo credit: Landscape Design Advisor Flickr CC BY-ND 2.0
Unity, in landscape design, is the overarching design principle that is used to create a sense of wholeness or harmony in the landscape.
Using too many individual plants or other objects in the landscape often leads to a cluttered and chaotic effect. On the other hand too many of the same kind of plant can lead to a boring effect.
Using a theme or other concept in landscape design can be a good strategy for coming up with ideas to create a pleasing effect in the landscape. Perhaps grasses are a favorite plant. Using different types of grasses throughout the landscape then might be the theme. Ideas and themes are limited only by the imagination. Other thematic ideas include:
Once a theme or concept has been identified, create unity in the landscape by using the principles of repetition, continuation, or proximity (how close objects are to each other) to create a pleasing, harmonious landscape design.
Repetition of elements throughout the landscape can be used to create unity in the landscape.
How close plants are to each other influences the sense of harmony in the garden. Individual plants with diverse characteristics can be successfully integrated if they look like they belong together.
A sequence of spaces or continuous flow of an element can be created to visually move the viewer's eye through the landscape. Various elements that can be used include:
Combine some or all of these methods to create unity. Once you have determined how you want to unify your landscape, add some variety to give it interest. Too much unity can be boring and the opposite is true when too many diverse plants are used.