We're in zone 9A and the ground never freezes hard. But we do get 6-8 nights of frost each winter. Occasionally we will get down into the 20s all night, which is the most dangerous for the bulbs. When a hard freeze is predicted I do cover the Amaryllis beds with dry leaves that I keep for the purpose, I pull the leaves away when the daytime temps get above 40. Temps down into the 20s will turn any leaves into mush, but the inside of the bulb is fine. I also plant the bulbs deeper than I have them in the pots, only the neck is above the ground and I use a inch of bark mulch over the bed. The newly planted bulbs will continue to put up new leaves this spring but I do not expect them to bloom again until the spring of 2015, perhaps not until later. Bulbs have been forced for this winter's bloom and they are pretty much depleted of food stores. It takes a good long while for them to recover and go on to form new buds. The buds are formed the year before they emerge to bloom. I've said before that about 1/4 of the bulbs go on to be spectacular in the garden, 1/2 do OK, and 1/4 never bloom again or die. Even in Florida, Amaryllis do have a short dormancy, where the leaves die back. I'm sure it has to do with shorter days and dryness, since winter is our "dry" season. Here it is Dec-Feb, frost just speeds up the process a bit causing the leaves to die back.
