It is best to start amaryllis bulbs in late summer or early fall to ensure they are fully bloomed by Christmas. Amaryllis bulbs require at least six weeks of growing time before they will begin to produce flowers. Be sure to use a pot that is deep enough for the bulb to fully extend its roots, and provide it with plenty of water and bright, indirect sunlight. You can also use a bulb starter solution to help the bulb establish itself and grow more quickly.