Four Years Later and H. callistophylla has Bloomed!

Took a while, but H. callistophylla has finally bloomed!  Here is the photo.  I bloomed it only because I gave it enough growing time using the grow tent to extend my usual short six week season.  In past years, after I brought the plant in from the greenhouse, it would go dormant for 10 months of the year.  By extending the growing season, it gave the plant a chance to flower.