Cordiline

[Oleanda]

My Cordiline had two "flowers" this year, now they are over should I cut them off or leave them?

[Buenchico]

Just go with whatever looks best to you:

Quote:
"In favourable weather, plants flower freely. This causes no harm and flowers can either be removed or retained and cut out later when no longer attractive".

Source:
https://www.rhs.org.uk/plants/popular/cordyline/growing-guide

[Chipchopper]

I'd let the bees etc have their share first and when the flowers have well and truely faded cut them off close to the stem.