At the beginning of this week, I spotted a scape on the bulb.
Yesterday, the scape opened to reveal many healthy looking buds inside.
And finally, this morning, the "fireworks" exploded!
Scadoxus is said to be a tropical bulb; it blooms on a yearly cycle and requires a dormancy period to do so. If grown in a hot country, like Vietnam, it will continue to grow throughout the year without going into dormancy and sometime bloom at its will when the rain season starts.
In my experience, when I disturb its roots, like up-rooting and re-planting, it will surely bloom for me provided that it hasn't bloomed previous to being disturbed. A blogger friend in Malaysia, James Missier, once tried to force scadoxus. Unfortunately, the process didn't work for him. Guess scadoxus doesn't like to be put into a refrigerator!