amaryllis bulbs sprouting in a south facing window

I bought 5 really nice looking amaryllis bulbs a few weeks ago, mail order from Sheepers. It was a good price for 5 big bulbs, unlabeled - so I don't know which is which. I think a couple are not going to make it :-( But one or two are sprouting well in my south facing window. Not the best success rate, but I will wait a while longer and maybe more will come along.