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Showing results for content tagged 'height management of ornamentals'. Search instead for the keyword 'height management of ornamentals'.

  • Height Management of Ornamentals

    MSU Extension’s floriculture educational and applied research programs help improve greenhouse crop production and business management by providing trusted information on new production techniques and management strategies.


  • PGR dilution guide

    Published on April 18, 2013
    A critical factor for effective use of plant growth regulators (PGRs) is that the solution is mixed in the appropriate concentration.

  • Early growth regulator drenches on poinsettia

    Published on November 18, 2010
    A technique to inhibit stem extension of poinsettia is to apply an early, low-dose PGR drench. This article will compare the efficacy of low-dose and early drench applications of paclobutrazol on poinsettia crops.

  • Height control of perennials: What works and what doesn’t

    Published on August 17, 2020
    This article discusses height control techniques that generally do or don’t work for herbaceous perennials forced into flower.

  • 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.

  • Sumagic on bedding plants

    Published on April 18, 2005
    Usage of this highly active plant growth regulator (active ingredient: uniconazole) on bedding plants is for the experienced commercial grower. Read how to use it, when it’s best used, and how much is recommended based on this MSU research.

  • Increasing height of chrysanthemum with PGR drenches

    Published on July 10, 2017
    Results are presented for an experiment in which we compared the efficacy of spray versus drench applications of a plant growth regulator (PGR) at increasing plant height of potted chrysanthemum plants.

  • Effective use of PGRs

    Published on July 18, 2014
    Plant growth regulators (PGRs) are sometimes not used to their potential; they are sometimes applied too late or at an inappropriate rate. Here are some important considerations for getting the most out of your PGRs.

  • Successful use of paclobutrazol

    Published on April 18, 2012
    Paclobutrazol is probably the most widely used plant growth retardant in the production of floriculture crops because of its wide range of efficacy and moderate- to long-lasting response.

  • Environment and PGR interactions

    Published on December 17, 2015
    When plant growth regulators (PGRs) are applied as sprays, their efficacy can be greatly influenced by the environment. Understanding how environmental factors influence PGR spray efficacy can lead to more effective and predictable plant responses.

  • Plug / liner dip guidelines

    Published on February 18, 2013
    A plug or liner dip is a plant growth retardant (PGR) application technique for ornamentals in which a tray of finished young plants is placed into a shallow PGR solution for a short period of time.

  • A new height control possibility for daffodils and hyacinths

    Published on March 18, 2013
    In this first of a two-part series, we look at ethephon (e.g., Florel) release as affected by substrate pH, and results of drenches on daffodils and hyacinths.

  • Tips on using uniconazole

    Published on April 18, 2011
    This article provides suggestions for how and when to use uniconazole (e.g., Sumagic and Concise) as a spray or drench to obtain desirable, more compact ornamental plants.

  • PGR rates and timing for plug production

    Published on November 18, 2003
    Application rates and timing of the plant growth regulator Bonzi (active ingredient: paclobutrazol) was put to the test in this Michigan State University research on seedling plugs of bedding plants.

  • Choosing growth regulators doesn't need to be a chore

    Published on October 18, 2007
    More growth regulators with the same active ingredient are available. Read these five considerations to help choose which one will best meet your needs.

  • How to avoid GA carryover

    Published on August 18, 2010
    Gibberellins (GA) can bind to plastic and concrete, and potentially cause excessive growth, especially in sensitive crops.

  • Spray vs. sprench vs. drench

    Published on July 18, 2010
    This article discusses three application methods for plant growth regulators: foliar spray, substrate drench, and sprench, which is a hybrid between a spray and a drench. Here are some guidelines to help you determine which method is most appropriate.

  • Getting results with liner dip

    Published on November 18, 2008
    In this article, we provide four keys to successful use of using plant growth regulators as liner (or plug) dips.

  • Fascination on poinsettia

    Published on September 12, 2005
    Did you hit your poinsettias with too much growth retardant? This Michigan State University research shows how to recover using products that contain gibberellic acid.

  • 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.

  • Success with PGRs

    Published on March 18, 2019
    Regardless of the desired outcome, successful use of a plant growth regulator (PGR) requires multiple considerations and attention to detail. This article summarizes practices to obtain the best results from your PGR applications.