Dragon fruit flower

Twenty-three days after I spotted the bud, my first ever dragon fruit flower opened.  I hand pollinated and hope my only flower produces fruit.

First dragon fruit flower bud

Thank God!  I have my first indication that my physical graffiti hylocereus (green pot) is officially mature.  I found a small flower bud.  The plant is 2.5 years old.  I have 3.5 years invested in growing dragon fruit.  The first PG plant froze during the harsh winter of 2013.