If everything else has been the same, it sounds like it needs dividing again.

Barbados Lily aka Hippeastrum or, erroneously, Amaryllis is a native of Brazil, not sure where it got the name Barbados. It's not a Lily either but in fact a member of the Daffodil family. It's found mostly in mountainous areas so does not need a rich soil provided it is not limey or alkaline.. The top of the bulb often pokes out of the ground. Climate: There are basically two seasons:1. hot and wet and 2, cooler, dry and sunny. It flowers towards the end of the dry season. The commonest beginner's mistake is to continue watering it after it has flowered. It must have a dry winter rest of at least 3 months or it will not reflower. During this period it often drops its leaves and can be repotted though it is best left undisturbed for several years. It can frequently be seen flowering with only the beginnings of new leaf growth. fertilizer if applied should be during the wet summer. Hope this helps . - Ian