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Floriculture & Greenhouse Crop Production

Department of Community Sustainability

Nursery & Christmas Trees

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  • A closer look at LED efficacy

    Published on January 5, 2022
    This article discusses recent advances in the efficacy (energy efficiency) of light-emitting diodes for plant applications.

  • Water vapor-pressure deficit

    Published on December 6, 2021
    The driving force for plant water loss is best described by the vapor-pressure deficit (VPD). This article discusses VPD classifications and what values are suitable during crop production.

  • Far-red and PPFD: A tale of two lettuce cultivars

    Published on October 5, 2021
    In part 3 of a 5-part series on the indoor production of leafy greens, the interactive effects of far-red light and light intensity on lettuce growth are discussed.

  • Light spectrum for different applications

    Published on September 8, 2021
    This article discusses the effects of the light spectrum on plants, and conceptually how it can be used for different greenhouse and indoor crop production applications.

  • Differentiating broad spectra

    Published on September 6, 2021
    In part 2 of a 5-part series on the production of leafy greens indoors, this article discusses how substituting white light (broad spectra) with red and/or blue light influences lettuce production.

  • What's All the Hype on Poinsettia Micro-Drenches?

    Published on August 21, 2021
    How do PGR micro-drenches compare to one heavy PGR drench on two red poinsettia cultivars?

  • Increasing the daily light integral

    Published on August 6, 2021
    The daily light integral (DLI) refers to the cumulative amount of light received per day, which influences the quality and yield of horticultural crops. This article discusses ways to increase the DLI for plants grown in greenhouses.

  • LEDs: More than μmol×J–1

    Published on July 7, 2021
    Light-emitting diodes (LEDs) are known for their efficiency at converting electricity into light. While efficacy is a very important consideration, there is more to them than just their μmol×J–1.

  • The indoor lighting guide: Growing seedlings under LEDs

    Published on July 1, 2021
    This 24-page guide provides research-based information about producing young plants indoors (without sunlight) under LEDs. Developed in partnership with GrowerTalks magazine.

  • Greenhouse Pest Management with Insecticides

    Published on June 14, 2021
    Research-based information is presented on how to manage greenhouse insects and other pests including thrips, aphids, whiteflies, mites, fungus gnats, and mealybugs.

  • Challenges of growing vertically in greenhouses

    Published on June 8, 2021
    There is a wide range of vertical farming approaches for greenhouse cultivation, but there are also challenges, some of which cannot easily be overcome.

  • LEDs on lettuce: White light vs. red+blue light

    Published on June 7, 2021
    In the first article of a five-part series on indoor production of leafy greens, we join the lighting debate discussing white versus red and blue light from a crop production perspective.

  • Light fixtures and their photon fluxes

    Published on May 6, 2021
    LED fixture come in all shapes, sizes and outputs — more technically, photon fluxes and spectra. This article explains the photon flux emitted by a light fixture and why it is important.

  • Greenhouse *A* System for Michigan Producers (FAS108)

    Published on April 13, 2021
    Greenhouse producers may use this bulletin to assist in becoming MAEAP verified.

  • Greenhouse Impatiens Downy Mildew Program

    Published on April 8, 2021
    Suggested treatments for impatiens downy mildew based on scientific research.

  • Greenhouse Disease Management

    Published on April 8, 2021
    Suggested treatments for common greenhouse pathogens of floriculture crops including botrytis, powdery mildew, downy mildew, phytophthora, pythium, rhizoctonia, etc. This information is for educational purposes only.

  • “Hidden” benefits of supplemental lighting

    Published on April 7, 2021
    High light can at least partly decrease the effects of other environmental parameters on greenhouse crops. These can be considered “hidden” benefits because the effects are often not obvious.

  • Sole-source (lighting) for seed

    Published on April 5, 2021
    By producing plants indoors under sole-source lighting, not only can we control plant traits by manipulating the light quality and/or quantity. but we can potentially produce more resilient plants.

  • Maximizing photosynthesis, minimizing respiration

    Published on March 8, 2021
    Conceptually, anything growers can do to increase photosynthesis and decrease respiration can increase growth, leading to thicker stems, faster rooting, more branches, and more and larger flowers and fruits

  • Consumers Energy Early Bird Bonus - Q1 2021

    Published on February 24, 2021
    Consumers Energy Business Energy Efficiency Programs are offering incentive bonuses under the Business Energy Efficiency Programs for qualifying projects.