In November or later, move the potted plant back into a warm bright area and start the growth cycle again by watering. Amaryllis like to be somewhat pot-bound so don't worry about repotting for a couple of years. Keep the soil, moist but not soggy. Don't let the bulb dry out especially once it starts to flower. Rotate the pot daily as it grows so the plant doesn't lean to one side.
Warm temperatures promote long, weak and spindly growth.
The bulb should flower within 4 to 8 weeks from the time you start watering again. The longer you have an amaryllis bulb, the bigger the bulb gets and the more flowers so it is worth the little extra effort to keep it year after year.