Drain and Mist the Arrangement
Turn the arrangement around one last time to check for any gaps or visible foam, and fill or cover them with a stem of foliage.
Give the flowers and foliage a good misting with a hand mister. Before putting the display in position, tilt it over a kitchen sink to allow excess water to drain away, then dry the base of the container; this is especially important if you intend to hang a floral foam display as a pew end, for example.
To prolong the life of the flowers, the foam must be kept moist: every 3-4 days, sit the arrangement on the draining board of the kitchen sink and gently pour a jug of water over it. Then mist the flowers and foliage again.