Record 020 · Guides · 2026
Deep winter greenhouses
University of Minnesota Extension
“UMN Extension DWG hub (growing-systems path): east-west passive-solar greenhouses with steep south glazing and fan-driven underground soil/rock heat storage; farm-scale…”
UMN Extension DWG hub (growing-systems path): east-west passive-solar greenhouses with steep south glazing and fan-driven underground soil/rock heat storage; farm-scale prototype partners and crop guidance for Minnesota winters. Defines deep winter greenhouses as passive-solar greenhouses using sun as primary heat source. Built east-west with steeply sloped south-facing glazing; solar-heated air drawn underground by fan into insulated soil/rock thermal mass for night heat. Lists five Greater Minnesota farmer partners building farm-scale prototypes (Owl Bluff, New Story, Honeydew, Tintah Beach, Chelsea Morning). Crops suited to DWG: lettuces, herbs, brassicas, Asian greens, sprouts—cold-hardy, minimal-light crops.
RELATED DISTINCT Minnesota DWG/climate-battery hybrid—not a walipini pit.
extension_guide|candidate
- Defines deep winter greenhouses as passive-solar greenhouses using sun as pri…
- Built east-west with steeply sloped south-facing glazing; solar-heated air dr…
- Lists five Greater Minnesota farmer partners building farm-scale prototypes (…
Defines deep winter greenhouses as passive-solar greenhouses using sun as primary heat source.
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