Brian, Since you mentioned "On the assumption it is not flowering at night this time", this implies that you have not looked at it at all hours. As you know, many irids open in the morning and close by mid day. If you went to work each day on a normal shift, you might never see them open. Just a crazy theory, you probably are aware of this (since you have seen it blooming for you in the past) and have looked at the right time. Lou