I have Den aggregatum, but since I don't follow the non-watering and then soak routine as in here
http://forum.theorchidsource.c...
my Den. aggregatum flowers only every couple of years and when it does, it also seems to flower later in the season ( mostly in Summer) than others report.
My mounted plant is hanging in bright sunshine in the greenhouse during the indoor season and I direct a bit of a water spray every day over it, which is not exactly what one is supposed to do, but the plant looks good!