This tree only flowers once a year, but my brother's cherimoya had a rough dormancy - had some dieback and was slow to push new growth - so his is just starting to flower. Mine won't flower again until March.

Unfortunately the flowers are pretty unspectacular; they attract beetles, not bees and hummingbirds. The fruit is where all the goodness is. Plus there's satisfaction in saying I can grow a rare tropical fruit tree in a very unusual location.