Hi -- I am getting back into orchids after 20+ years of child rearing. I am building a new greenhouse and would like to use hot water under bench root-zone heating. Does anyone have experience with this system? I live near Sacramento where we rarely experience sub-freezing temperatures, but it is normally damp,foggy and cold (40-45F) from November to March. Thanks for any advice. Andy
Last edited by awalker1106; 10-21-2007 at 10:44 AM..