Here in the southern UK Ranunculus calandrinioides is easily grown under cold glass. Sometimes seen on the showbench it is all too often grown rather lax. This is due to the winter growth being drawn up by low winter light levels. To counteract this grow it as hard as possible (ie don't keep it frost free under glass) and give it as much light as possible. I have also found that it keeps much more compact (and much more beautiful :)) if kept bone dry until mid winter. In this way growth does not commence above ground until early spring and is much less lax. (Watered in early autumn, after a summer rest it comes into growth well before Christmas.) Until this year I had only the one plant but having raised a crop of seedlings I will try it in a dry site outside one day. Tony Goode. Norwich UK. Mintemp -8C