Don't know about your area, but here in UK these BULBS are becoming very popular, we can only grow them as indoor plants as we get too much wet weather and too cold winter. Try searching Bulb suppliers also, they are lovely and the sight of a huge clump of them growing in Florida made me realise what I was missing because we watched large Moths and night flying insects swarm to the White flowers that seem to glow in the dark. good luck. WeeNel.
Thanks all! I have ordered Crinum Latifolium already! It's amazing that after one year it started growing. I thought they died since last winter there was heavy snow in my area. Now I have four plants which are about 1 foot tall.