My plant recently sprouted flowers at the top. I've had this plant for 11 years. It was one of several plants in a Kroger planter I received as a birthday gift. It's grown at least 2 ft. since I got it. I have repotted it twice, last summer being the most recent repot. It has done well considering I had no clue what I was doing with it.

Should I be trimming/pruning this plant? What do the flowers at the top mean? I realize now, after reading through the posts here that the pot it is in is quite large but it seems to be doing well. It does develop some yellow leaves which fall off, on occasion.

I don't fertilize regularly. Should I?

Thank you for any advice. This plant is my favorite. I've had it so long that I'm quite attached to it.