The 'FlapJack' plant refers to both Kalanchoe thrysifloria and K. luciae.
Both of these plants are monocarpic; however, they produce a lot of offshoots at the base.
My flower spikes only reach 2-3 feet tall and I cut them off when they stop blooming. Usually in a couple of months.
The excessive white powder starts to make a mess if I leave them standing.
These are great plants to grow as they can become huge if it is very hot and dry.
I have seen them with 10 inch paddles.
The red edge K. luciae is my favorite and the varigated one with wavy leaves is outstanding. Unfortunately it is a patented cloned plant and the offshoots are not as spectacular as the original clones.