Greenhouse flowering through winter months in Midwest

Discussion in 'Greenhouses' started by Popeye, Sep 15, 2020.

  1. Does anyone have experience flowering through the winter in a greenhouse?

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  2. Heya Popeye,

    First, you need to ensure that your plants will have sufficient light to flower. If you're in the US, check out this tool to see estimated Daily Light Integral (DLI) for your area for the months that you intend to grow in.

    Story Map Series

    The daily light integral is the sum total amount of photosynthetic photons that hit an area per day. A DLI of about 30-40 mol/m2/day is recommended to flower cannabis with about 20 being the minimum. Also keep in mind that greenhouse glazings will reduce light transmission to the crop. You can also use this info to figure out if you may need to supplement with artificial light and how much you will need.

    This is another tool that can be used to model things like DLI and heating requirements in a greenhouse:

    Virtual Grower 3 Model : USDA ARS
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