I had never seen an agapanthus bloom until we came to Uruguay.  I know they exist in the U.S., but I was an agapanthus virgin!  And thus originated my addiction... 
  They really are a no-brainer plant.  In a temperate climate, even with a handful of freezing temps every winter, they stay green and flourish as a plant year-round.  Come late spring, they burst into bloom.   The first year, I made several trips to the nursery and requested ONLY blue ones.  Well, that didn't work, but I love the white ones too.  I get so excited in December when they begin to bloom.  
   You can divide them in the early spring and they will replicate.  Good plants to give to friends!  Did I mention the bees and the hummingbirds are addicted to them, as well?