Cut the old and dead foliage down to the top of the amaryllis plant.
Set the growing pot in a south-facing window so the amaryllis can receive plenty of sunlight.
Water the plant to keep the soil moist.
Apply a balanced, water-soluble fertilizer every two weeks. Read the fertilizer instructions carefully before application.
Move the amaryllis plant outdoors when the danger of frost passes. Place the amaryllis back indoors before the first frost arrives.
Cut the amaryllis foliage down to 2 inches when the foliage dies. Allow the remaining foliage to dry completely. Remove the amaryllis bulb from the soil.
Brush the excess soil off the bulb. Set the amaryllis in a cool, dark location such as a refrigerator crisper drawer. Leave the bulb for six to eight weeks before you plant the bulb again.