Certain parts should be different, perhaps larger, of a contrasting color, form, fragrance, or texture than the rest, depending on the function of the design. Again, if too many elements are introduced the effect is lost. Emphasis can be achieved only by limiting the number of dominant design elements. Sequence is the movement of the garden. It is the rhythms that develop when line, form, texture, and color are changed in a consistent way to lead in a particular direction or to a point of focus.
Sequence helps to connect the various design elements.
Scale within the garden, as distinct from the overall scale of the garden as discussed earlier, refers to the harmony of the garden. That is, all the elements of a garden should agree in the sense they convey of the size of the whole. The actual size of an object is different from its relative scale or proportion in relation to other neighboring objects. So scale is concerned with the relationship between the size of an object to the size of the other objects within the same composition. Thus, a tiny alpine plant is out of scale among tall trees, just as it would be planted next to a large building.