Growing flower bulbs in water has become a hobby since we first began to experiment in December 2014 with bulbs of grape hyacinth (muscari) and three varieties of amaryllis. (Last year, we tried fragrant hyacinth.)
After they all flowered, there was the question of what to do with them. The small grape hyacinth bulbs were thrown into the backyard, and they bloomed the following spring wherever they landed -- without planting, pampering or care of any stort. As for the amaryllis bulbs, I had read that if you keep them in a cool, dry, dark place that there's a chance they can be forced into indoor bloom again.
Of my three amaryllis candidates, one wasn't in good shape (the much-photographed, red and white amaryllis 'Splash'). The largest and sturdiest, which previous posts and photos reveal was a 'Magnum' bulb, seemed a good candidate for saving over winter.