Hi All,
Sorry I've been away for so long. I am here to report -- TAH DAH!
-- at last I have a single, fat blue bloom on one of my morning glories!!!
To answer questions posed, I have some planted in the ground in low-ish light, most in bright light, with some of those in the ground (New England clay with some bagged soil and mulch) and some (incl the one that has popped)in a large pot. I did take the advice to neglect them just a bit, and they seemed to take off at that point. Perhaps they also like the cooler mornings we've had recently. I'm crossing fingers that there will be many more blooms to come. :-) Karen