> > Is there any sun on your roof? > > > > This link is about a guy that grew pumpkins on his rooftop: > > http://www.rdrop.com/users/krishna/willweek.htm I saw something along these lines on (I hate to admit it) Martha Stewart's show. She was at a bakery in NYC. They also sold sandwiches and such. The owners took over the roof space & added greenhouses. The excess heat from the ovens was vented to the roof to heat the greenhouses. It was pretty cool! They had all sorts of tomatoes & greens to use fresh on their sandwiches, etc. The tomatoes were trained onto wires that ran from the soil level to the roof. The tomatoes would grow up to the roof of the green house, then they would lower the wires to the ground & let the tomatoes keep growing up the wires. It was fascinating. Helen