Forcing Amaryllis to bloom for Christmas

I have a very large amaryllis bulb from last year so I was determined to make it bloom for Christmas in 2013. I chopped the leaves back in August, lifted the bulb and stored it in a closet until new leaves started to poke through. This happened around November 1st so I potted the bulb around that time. Just in time for Christmas blooms!

I have a few more bulbs which I didn't force into dormancy by cutting the leaves. They are still sitting in pots with no blooms in sight.