At the end of 2007 I bought two amaryllis bulbs from a reputable
online vendor who was getting rid of them at half-price. They both
bloomed, and I was able to re-bloom them this winter, so I assume I
know what I'm doing with amaryllis. But last Christmas I bought three
more bulbs of different varieties from the same vendor's closeout
sale. One of them bloomed. The other two had flower buds just start
to peek out from the top of the bulb, then the buds sat there and
didn't rise further while the leaves grew. They stayed that way for
two months, now the buds are shriveling. The leaves are still mostly
healthy. Does anyone know what caused this?