I like using leather leaf to fill in the largest part of greening in all centerpieces. Wholesale bunches are usually bundled by weight, but generally contain around 20 stems.
You can see how quickly you can set the outline and size of the flower design.
Insert greenery pieces straight up and down in the middle part and then begin to angle outwards as you work your way down the sides.
Longer pieces (but shorter than the two ends) are inserted into each corner of the design.
Again, insert the stem angled upward slightly, so that the tips of the bottom ferns lightly brush the table top.