This attractive display looks good and thrives  in a sheltered,filtered light position.
The Sphagnum Moss continues to grow behind the glass vase.Regular watering will benefits the moss and the fern,with any excess water being drained off by tipping the vase as you gently hold the plant in place. A good tip is to use collected rain water as natural bush-species prefer the application of a "soft-water".
 When the water level reaches the top of the drain-medium at the base of the vase it is time to remove the excess water.