Fill a shallow bowl or tray with a 3-inch layer of clean pebbles or florist's marbles. Use a container wide enough to hold between three and five narcissus bulbs.
Push the bulbs into the pebbles, flat side down, until they remain upright on their own and approximately a third of the bulb is inside the gravel. Place the bulbs so they are nearly touching.
Add water to the bowl until the bottoms of the bulbs are touching the water, but the bulbs aren't submerged.
Set the bowl in a cool room in a brightly lit location, such as near sunny south- or east-facing window. Narcissus grow best at temperatures between 65 and 70 degrees Fahrenheit.
Replenish the water in the bowl as it evaporates so that the water level remains constant. Drain and replace the water completely if it becomes cloudy or dark-colored.
Cut off the old narcissus flowers once they begin to wilt. Removing the old blooms improves the appearance of the display and diverts the bulbs energy to opening any remaining buds.