Well...I left them out hoping for the flower to open.. It got. Down to 31.5 they said ..the plant or flower showed no change...a few days later however showed flower stress... So I brought them inside.. The two more developed flowers were limp and hollow feeling...I still had hopes for the last one and tonight I knew it wasn't going to open either.. The idea in the posting was to figure out at that low temperature. What length of time. A long time and I'd had moved them in right away ..I thought it would be soon and kept it out so it would be un disturbed .. As all along it developed quite cool... The plant they say is good to25*F. I'd say the flowers are hurt at below 35*F
This plant is big and healthy so I bet I get another try at flowering from it pretty soon .
Yes...they have a pure white flower... A beauty and a joy to witness it's opening...