The pots my crinum are growing in are probably too small for the size of the bulbs, I try to have a snug fit. I have not fed them, so I will try feeding them when they are actively growing. For now I can give them a mulch of worm castings. Food may be the problem. Thanks for the ideas.
I am going keep them under direct fluorescent light this winter. Last winter they were not under the lights, so their leaves turned brown and went dormant.
The cool temperature in my basement may be a problem too. I may have to move them into an extra room, that is heated, where I have a plant stand with lights????