Ah the wonders of digital photography and exif. I realised I have some photos of my plant. On 4 June 08 I photographed it at 14.49 in the garden at Crug Farm Nursery on the Welsh coast on a dull day, and my plant at home on 15 August at 9.01. So as we might expect a morning flower lasting longest on a dull day. Another enticing bud showing, it's warm but rain expected so who knows? Brian Whyer, Buckinghamshire, England, zone 8 ish