Good question! I have grown so many plant over almost 30 years with much success…but not hyacinths. So read: NOT YOUR FAULT! If they are forced into bloom early indoors in water or soil, they can resent a change of location/light/temp/etc. when you bring them home from the greehouse/nursery, and then they fail. If you try to put them outside after they bloom once, they are usually a pain in the neck and refuse (like most forced bulbs, which just get exhausted being coaxed extra-early bloom in pots). I’d toss them….as I have many gift hyacinths, which always seem to hate leaving the controlled conditions of the greenhouse they grew in ti come live with me…but if you cannot bear to, then water carefully (probably not more than once a week till they push up farther and reallt start growing actively. Then it can be once a day or every other day–their thirst changes as they get active. On the other hand, they are lovely things when thy work..so we all just keep trying! Amaryllis are SO much easier, I recommend them next time (and you can rebloom them year after year). M.