The previous step in this cascade bouquet tutorial was using the italian ruscus to give length and dimension to the bottom of the cascade.
Ruscus is also easy to cut into separate pieces and insert randomly into the upper portion of the bouquet.
Cut both the top and bottom part of the stem at sharp angles. This hides the cut from being view at the top and the bottom inserts more easily into the bouquet foam.
Don't be too precise with your placement. Insert here or there and it gives a lovely casual look to the greens while adding interesting texture.
You can see that the mechanics are being concealed, yet leaving plenty of open foam for your flowers that are being added later.