I love layering materials when I arrange because, when done correctly, layering creates depth.
Follow these tips to avoid creating a flat arrangement when layering:
1) Angle your leaves to give your arrangement dimension.
2) Fold your leaves to make the arrangement more interesting by displaying the bottom of the leaf.
3) Cut your materials to different lengths to create depth.
4) Be creative or unconventional by placing flowers on the bottom of your arrangement and leaves on top!