Hyacinths have been grown on water for many years, including in plain glass jars with narrow necks, and as long as you can ensure that the base of the bulb with not actually touch the water into which the roots grow, you can use almost any type of container. This includes the specially made vases that have a cup shaped compartment in which the bulb can sit securely above the water.

You can add colored stones or shells to support the bulb, and it is a good idea to add a small amount of charcoal to the water to keep it fresh and sweet. When necessary, top up the water level so that it is just below the base of the bulb. If the base of the bulb sits in the water the bulb will rot. Put the bulb in a dark, cool place, at a temperature no higher than fifty degree Fahrenheit, as for those growing on compost.

Within a matter of weeks the small roots will begin to grow down into the water beneath, soon followed by the thrusting shoot above the neck of the glass. When the shoot is about 2 inches long, move the glass into a light, warmer position ready for flowering. Gradually increase the temperature and light as the bud lengthens. The drama of the roots is seen well where light comes from behind.

So choose a place in front of the window where you can enjoy the extra sparkle. But in order to prolong the life of the flowers, avoid direct sunlight and put them in a cooler room at night. The bulb should be discarded after flowering, having used up its food reserves; it will not produce flowers a second time.