Insulated greenhouses built in Alberta

Passive solar greenhouse+Bitcoin mining=Tomatoes in extreme cold climate

Insulated tunnel greenhouse in Southern California

2nd Passive Solar Greenhouse is Finished

Tomato plants and more seedlings in the passive solar greenhouse on Mar 31

Prepare soil and transplant tomatoes in early spring in the passive solar greenhouse

Installing the inner trusses for my second greenhouse

The greenhouse performance in the extreme cold

Clean snow with vibrators on the greenhouse

Grow tomato seedlings in January

The design of a commercial size Chinese style passive solar greenhouse in Alberta

Growing year round in a passive solar greenhouse without heating