Leather leaf fern is a staple in every professional flower shop. This wedding greenery is inexpensive and comes in bunches of normally 15 to 20 stems depending on the farm.
Remember all greenery is a live product. Size and shape is similar - but not STANDARD. Growers usually pack by weight - not number of stems to a bunch.
I begin filling in the urn with some of this leather leaf, facing the greenery forward and outward.
Be sure to place some smaller, shorter stems in the front, sticking out straight forward and tilted downward. This adds to the depth of the design instead of everything sticking flat and upward (a common design error).
Simply place a leaf here and there, looking for open spaces in the design.
Keep in mind that most greenery is generally cheaper than flowers. It fills out the design, helps to conceal the mechanics (such as the foam and tape) and creates a bigger look for a cheaper price.