BEMIDJI-The Northwest Regional Sustainable Development Partnership and the Bemidji Community Food Shelf Farm will host a public field day at a Deep Winter Greenhouse to demonstrate the production process and discuss ongoing horticultural and economic research results.

The field day will be from 10 a.m. to 1 p.m. on Tuesday, May 28, at the Bemidji Community Food Shelf Farm, 1260 Exchange Ave. SE.

The event includes presentations about Deep Winter Greenhouses and university research, hands-on workshops, and a tour and a question-and-answer period, a release said. The event is free to the public. RSVPs are requested at

"Deep Winter Greenhouses represent a future of local foods that will come from innovations to expand markets and the production season," said Greg Schweser, director of Sustainable Agriculture and Food Systems for the University of Minnesota Extension Regional Sustainable Development Partnerships, in the release.

Deep Winter Greenhouses allow small farmers to grow vegetable crops year round. The design features a steeply sloped south-facing glazing wall that allows the maximum amount of solar radiation into the greenhouse on the coldest day of the year, the release said. That hot air is drawn underground into a heavily insulated bed of crushed rock where it is available for use to heat the growing space at night. Farmers are able to grow cold hardy, low light crops such as lettuce, Asian greens, and brassicas with minimal use of external heat and lights.