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Floriculture & Greenhouse Crop Production

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  • Turning on/off supplemental lighting

    Published on October 23, 2013
    The costs to operate high-intensity lighting in greenhouses are quite high, so operation of lights should be managed as efficiently as possible.

  • Problems with footcandles, lux and lumens

    Published on September 23, 2013
    The horticultural industry should discontinue use of photometric units such as lumens, lux and foot-candles. These units are based on people’s perception of light and are a highly misleading indicator of plant growth and flowering applications.

  • Managing photoperiod in the greenhouse

    Published on March 23, 2013
    This six-page bulletin provides information on how to control the day length in commercial greenhouse production of floriculture and nursery crops.

  • Lighting plugs at different growth stages

    Published on January 23, 2013
    Plants that received supplemental lighting during the entire plug stage were of highest quality. The greatest benefits occurred when seedlings were lighted during the later stages.

  • Maximizing photosynthesis to improve growth

    Published on December 23, 2012
    Plant growth is suppressed when light, CO2, and/or water are not sufficiently available inside greenhouses.

  • Producing High-Quality Rooted Cuttings.

    Published on October 24, 2012
    Researchers study the impact of light during propagation on growth and quality of vegetatively propagated annual bedding plants.

  • Reduce Flowering Time.

    Published on September 24, 2012
    Use these guidelines to give plants the right amount of light during propagation and finishing, and reap the benefits of early, high-quality crops.

  • Which light sensor should I use?

    Published on September 23, 2012
    This article focuses on the different units of instantaneous light intensity and how each is measured.

  • Replacing incandescent lamps

    Published on August 23, 2012
    Incandescent lamps can at least partly be replaced by compact fluorescent bulbs and/or LEDs without losing the ability to control flowering of ornamentals grown in greenhouses.

  • Lighting the way with LEDs

    Published on July 10, 2012
    Light-emitting diodes (LEDs) are one of the trendiest technologies in the greenhouse industry. There are particularly interesting opportunities with LEDs in the production of young plants and highwire vegetable crops.

  • Lighting greenhouse vegetables

    Published on December 7, 2011
    The primary way to increase fruit yield (fruit number and/or size) is to increase the amount of photosynthetic light provided to plants.

  • The red to far red ratio

    Published on May 23, 2011
    Plants absorb and use most of the red light available to them for photosynthesis, but reflect or transmit most of the far-red light.

  • Saturating DLIs for flowering

    Published on February 15, 2011
    An in-depth look at daily light integral (DLI) and how bedding plants can be classified into different light response groups.

  • Daily light integral & flowering of annuals

    Published on November 23, 2010
    The daily light integral can influence crop timing and quality characteristics including branching, flower number, and flower size. This article presents research-based information on how light quantity influences production of annual bedding plants.

  • The future of greenhouse lighting

    Published on September 24, 2010
    This article, written in 2010, gazes into the crystal ball about how light-emitting diodes (LEDs) will become the primary lighting source for plant applications.

  • Getting the most out of light measurements

    Published on September 24, 2010
    Managing and manipulating greenhouse light levels puts your operation at an advantage. Let’s get your operation started

  • Rapid flowering of pansy

    Published on March 22, 2010
    Pansy has a unique photoperiodic flowering response. What can be done when varieties don’t flower uniformly or on time?

  • Supplemental lighting guidelines for young plants

    Published on January 24, 2010
    Recent university research has examined how plants respond to daily light integral at different times of the year in various areas of the country.

  • Strategies for supplemental lighting

    Published on November 24, 2009
    Different methods of greenhouse lighting have different purposes — sometimes to extend the photoperiod and sometimes to increase the daily light interval. Knowing their differences may help you make better choices for your operation.

  • LEDs in floriculture

    Published on June 24, 2009
    LED technology, first used in the mid-1980s, has come a long way and may make its way into the greenhouse in coming years.