I don't have a greenhouse here, I did have one in the UK. My biggest concern in this climate I'm in now would be the cost of heating in winter and that's why I don't have one. If you keep plants in it year round there will also be a need for cooling. I'm sure others with daylilies in greenhouses will chime in here but there's also a specific greenhouses forum on NGA that might be of interest too.
http://garden.org/forums/view/...
