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Once a flower has faded, cut the flower where it meets the main stalk with a clean knife or scissors. Make sure to remove the green lump and thin green stem attaching the flower to the stalk. This prevents the plant from producing seeds, which requires a lot of energy that could be going into survival and growth instead. The main stalks contain food and water the plant can use, but they will likely begin to droop or turn yellow shortly after the flowers fade. They are no longer useful at this point, and should be cut back to within 2 inches (5 cm) of the bulb.  Be careful not to cut the leaves or the top of the bulb. Only the flower stalks should be removed.  Do not be alarmed if sap runs out of the cut. This is normal for a well-watered plant. Most people with amaryllis plants keep them indoors while they bloom in winter. If this is the case, move the plant to a windowsill with indirect sunlight to let it adjust to increased sunlight. Pick a spot that is bright and receives lots of sunlight, but not by direct exposure. You may skip this step if the plant was already exposed to indirect or full sunlight.  In the northern hemisphere, north and east facing windows receive indirect sunlight. In the southern hemisphere, south and east facing windows do. Make sure to keep the plant relatively cool, too, at about room temperature. This is around or slightly warmer than 60 degrees F. Your amaryllis will likely require daily watering unless kept in a humid environment or planted outside in moist soil. Don't let the soil dry out completely, at least not for longer than a few hours. You’ll want to keep the soil just slightly moist at all times. After growth begins, also fertilize the plant with a half-strength, water-soluble fertilizer every two or three weeks. Depending on your local climate, this typically begins in May or June in the northern hemisphere. In the southern hemisphere, warm weather usually begins in December or January.
Remove each flower as it fades. Cut the flower stalks once they yellow or sag. Move the amaryllis to an area with bright indirect light. Water the soil whenever it begins to dry. Continue on to the summer section as soon as the weather becomes warm.