What is the best time of the year to repot amaryllis?

I looked into a capped pot and saw white roots along the top edge.

What is the best time of the year to repot amaryllis?
Keep watering and fertilizing your Amaryllis until early fall, then allow the soil to dry out. The foliage will wilt.Now is the time to repot the Amaryllis, which should be done every 3-5 years.For propagation plant offsets at repotting time.Plant each bulb in a 6 inch. pot, leaving about half the bulb exposed.Keep warm and fairly dry until growth appears.Then start watering. Allow surface to dry between thorough soakings with lukewarm water.A. likes bright light. Mist leaves occasionally.
Reply:In the fall stop watering them...take them from the soil and store in dark boxes with newspaper around them to keep them dry and warm. In the winter repot them and start watering them for a spring flower. In the south it is ok to leave them in the ground all year long and every 3 years separate them.