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Floriculture & Greenhouse Crop Production

Nursery & Christmas Trees

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  • Leafy greens: Green & far red LED lighting

    Published on February 1, 2019
    Indoor production of leafy greens, Part 1 of 4: Substituting green or far-red light for blue light can increase lettuce and kale yields.

  • Ethylene in floriculture

    Published on January 7, 2019
    Ethylene can be a harmful contaminant in greenhouses and during shipping, but there are also situations when ethylene can elicit desirable responses in greenhouse crop production.

  • DLC requirements for LED fixtures

    Published on December 5, 2018
    This article highlights the DesignLights Consortium's (DLC's) requirements for testing and reporting horticultural lighting fixtures that contain light-emitting diodes (LEDs).

  • Growing ornamental seedlings under white LEDs

    Published on November 15, 2018
    Michigan State University researchers discuss the impacts of using white light on plant growth and human vision, as well as energy considerations when growing ornamental seedlings indoors.

  • White LEDs for plant applications

    Published on November 12, 2018
    Many horticultural lighting fixtures combine blue and red LEDs. However, there are merits to using fixtures that partly or completely contain white LEDs.

  • New, high-resolution, interactive DLI maps

    Published on October 10, 2018
    New maps of the photosynthetic daily light integral (DLI) in the United States have been developed and are now available online.

  • Purple vs. pink vs. white LED fixtures

    Published on September 10, 2018
    LED fixtures that emit a purplish light are usually less preferred by people, but are often the most efficient at converting electricity into light useful to plants.

  • Using a GA to increase plant height

    Published on August 8, 2018
    Regardless of the cause, the most common technique to increase plant height of containerized flowering plants is an application of gibberellic acid (GA) by someone certified as a pesticide applicator.

  • An update on LED lighting efficacy

    Published on July 5, 2018
    In plant lighting, the photosynthetic photon efficacy of a fixture quantifies how effectively a fixture converts electricity into light useful for photosynthesis. This article provides an update the efficacy values of LEDs as of 2018.

  • Horticultural lighting applications

    Published on June 11, 2018
    This article summarizes the different lighting applications and characteristics used in horticulture, including in greenhouses and indoors.

  • UV radiation and applications in horticulture

    Published on May 1, 2018
    Ultraviolet (UV) radiation is outside of the photosynthetically active waveband, but it is biologically active and regulates plant growth.

  • Using Data Loggers in the Greenhouse

    Published on April 6, 2018
    Most growers do not have extensive environmental control systems that keep historical records of the greenhouse conditions. In these cases, you will find that using a data logger will allow you to easily see past and present environmental data.

  • Accelerating growth: What works and what does not

    Published on April 1, 2018
    The most effective way growers can accelerate plant development is to increase the greenhouse air temperature.

  • Causes of flower bud abortion

    Published on March 14, 2018
    There are many potential causes to flower bud abortion, including pests, environmental factors, and cultural factors.

  • Monitoring Carbon Dioxide in the Greenhouse

    Published on March 4, 2018
    In this article, you will learn how handheld, stationary, and computer-controlled sensors can be used to monitor carbon dioxide (CO2) and control enrichment in controlled environments.

  • Building a greenhouse grower’s toolkit: Infrared thermometers.

    Published on February 5, 2018
    In this five-part series, you’ll learn about the tools you need to keep track of your greenhouse environment. The first tool is an infrared thermometer for measuring plant temperature.

  • Temperature integration

    Published on February 5, 2018
    Plants integrate and respond to temperature over an extended period, and not just the day or night temperature.

  • How to Measure Greenhouse Light

    Published on February 3, 2018
    Are you providing too much light and wasting electricity by operating your supplemental lighting when it is not required? The only way to answer this and many other light questions is to learn how to select and effectively use quantum sensors.

  • Keeping in Front of the Curve: pH and EC Monitoring

    Published on January 12, 2018
    In-house monitoring of the growing substrate pH and EC will help to avoid nutrient disorders and shrinkage. Setting up a monitoring system is easy and the steps are highlighted in this article.

  • Maximize the benefits of supplemental lighting

    Published on January 8, 2018
    Purchasing, installing, and operating supplemental greenhouse lighting is fairly expensive. Here are some tips and considerations to maximize your supplemental lighting system.