In order to get your Amaryllis to rebloom for Christmas, you'll need to follow a few simple steps. First, you'll need to carefully remove the bulb from the soil and store it in a cool, dark place for 10 to 12 weeks. During this time, the bulb will be in a resting period and won't need any water or light. After the resting period, you'll need to replant the bulb in fresh, well-draining potting mix and place it in a sunny location. Water the bulb regularly and wait for the new blooms to emerge.