Gardens have usually been built in the open to allow for the greatest dispersal of light but it is said the Romans built an underground garden to provide fresh pineapple for Caesar. The underground garden, when enclosed, can provide fresh fruit and vegetables every day of the year. (Links verified September 2, 2011)
Benson Institute-Adaption from Noel Velasco's teaching Manual on procedures for building an underground greenhouse, called a Pankar-huyu. Benson provides a lot of great information not just on the Pankar-huyu but the Walipini , another underground greenhouse used for year around vegetable production. Study their site as they cover both subjects extensively.
Canada’s first legal marijuana farm- lies in copper mines-Northern Manitoba mine now produces legal mary jane. Wired News, Eden in a Mineshaft
Environmental Growth Chamber-These plant chambers can utilize sulfur lamp lighting. For those who must meet exacting standards
History of Greenhouses-From the Romans to the present man has been searching for a way to keep plants alive even in the winter months. 1, 2, 3, 4, 5
In a wild garden-Neat article worth reading by Tom Bender.
Indoor Gardening-Why do some people grow plants indoors and others grow nothing? A step towards understanding.
Mother Earth-Speak of greenhouses. How about an earth sheltered one?
Prairie Plant Systems-Biosecure underground growth chambers-in Manitoba and also in White Pine Michigan. Article from Innovation Place
Solar Cold Climate Greeenhouses-No heating yet able to grow tomatoes when outside its -40. All natural. Wisconsin.
The Solar Greenhouse-experiments with trenches to extend the growing season. Tibet.
Solar Power your garden dome-Might be of interest to pit greenhouse designers.