After dormancy, repot in a fresh mixture so the bulb neck is above the soil level. Select a clean clay pot, with a drainage hole two inches larger in diameter than the amaryllis bulb. Blooms are best if the bulb is slightly pot-bound. Fill the container with a good potting mix. The soil line should be about an inch down from the top of the pot.
Amaryllis prefer a humus-enriched, sandy soil that is slightly acidic.
Add 1-2 tablespoons of superphosphate to each gallon of potting mix. Water and gradually move the pot to brighter light. Amaryllis received as holiday gifts can be moved to the garden when the weather is warm. Simply scratch a little high-phosphorus fertilizer into the ground, then place the potted amaryllis on that spot. The roots will reach down through the pot into the garden soil.