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Yield of Leafy Greens and Microclimate in Deep Winter Greenhouse Production in Minnesota

Author

Listed:
  • Claire Flavin Hodge

    (Department of Horticultural Sciences, University of Minnesota, St Paul, MN 55108, USA)

  • Mary Rogers

    (Department of Horticultural Sciences, University of Minnesota, St Paul, MN 55108, USA)

  • Dan Handeen

    (Center for Sustainable Building Research, University of Minnesota, Minneapolis, MN 55455, USA)

  • Greg Schweser

    (Sustainable Development Partnerships, University of Minnesota, Minneapolis, MN 55455, USA)

Abstract

The Deep Winter Greenhouse (DWG) uses passive solar technology to create an environment where cold tolerant crops like leafy greens can be grown during the winter to satisfy consumer demand for fresh local produce year-round and increase revenue for farmers. A cultivar trial consisting of 12 different salad greens was conducted in partnership with three farmers in order to determine suitable cultivars for these unique systems. Yield and days to maturity were recorded, and microclimate conditions such as light, temperature, and relative humidity were tracked throughout the season. This study included three sites from three distinct locations within Minnesota. Environmental differences among the DWG sites and within site replicates were observed. Yield also varied with micro-climate. The trials demonstrate that lettuces and greens such as ‘Florence’ ( Lactuca sativa L.), ‘Salanova’ ( Lactuca sativa L.), and ‘Vitamin Green’ ( Brassica rapa L.) generally grow well. These cultivar trials, coupled with other horticultural trials and economic analyses, will better inform recommendations for farmers growing in these unique environments.

Suggested Citation

  • Claire Flavin Hodge & Mary Rogers & Dan Handeen & Greg Schweser, 2018. "Yield of Leafy Greens and Microclimate in Deep Winter Greenhouse Production in Minnesota," Sustainability, MDPI, vol. 11(1), pages 1-11, December.
    • Handle: RePEc:gam:jsusta:v:11:y:2018:i:1:p:28-:d:192223
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    References listed on IDEAS

    as
    1. Tong, Guohong & Christopher, David M. & Li, Tianlai & Wang, Tieliang, 2013. "Passive solar energy utilization: A review of cross-section building parameter selection for Chinese solar greenhouses," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 540-548.
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