Lake City Catholic Worker Farm (ribbon cutting May 5, 2018).Alternative Roots Farm in Madelia (ribbon cutting October 29, 2017).Grandpa G's Farm in Pillager(ribbon cutting December 8, 2018).Bemidji Community Food Shelf (ribbon cutting September 30, 2017).Organic Consumers Association Finland, MN (ribbon cutting February 18, 2017).
RSDP supported the construction of five DWG 2.0s with the following community partners: The Center for Sustainable Building Research designed the earlier DWG 2.0 following an analysis of the performance of several early DWGs in use across Minnesota.
The University of Minnesota Extension Regional Sustainable Development Partnerships, as part of a statewide initiative to advance DWG technology, have worked with the College of Design's Center for Sustainable Building Research to develop construction documents for two DWG designs. Crops well-suited to DWG production include a variety of lettuces, herbs, brassicas, asian greens and sprouts. This heated rock bed is a thermal mass that acts as a heat battery and stores heat for when it is needed at night.ĭWGs in Minnesota can be used to grow crops that thrive with minimal light, providing year-round production capacity for small-scale farmers and gardeners. The sun heats the air inside which is blown underground with a fan and stored in rocks. This wall is specially angled, depending on latitude, to get the most possible solar energy on the coldest day of the year. DWGs are built in an east-west position, with a glazing wall that faces south.
There are a few important aspects of the design that make this possible. DWGs are passive-solar greenhouses that rely on energy from the sun to heat the building instead of more traditional heating sources. A Deep Winter Greenhouse (DWG) is a greenhouse designed to limit the amount of fossil fuel it takes to grow crops during cold winters.
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