Is it a evergreen our a deciduous agapanthus

Hi
Got given a agapantus plant its flowers a pale bluey purple color just the typical colour you expect if that makes sense. The person that gave it to me was just sharing clump they were given so they don't know what type it is. Does it look like a evergreen or a deciduous variety?

 

Can't really tell for sure, but my deciduous ones are starting to yellow from the leaf tips in the same way (they go completely yellow as they die back).