Height Management of Ornamentals

  • The shade-avoidance response

    Published on May 11, 2022
    When other plants are nearby, they detect changes in the light environment and try to out-compete their neighbors. Understanding this shade-avoidance response can help growers to promote or prevent this response, depending on the growth desired.

  • 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?

  • 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.

  • 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.

  • 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.

  • 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.

  • How does Spray Water Alkalinity affect the Efficacy of Commonly used Plant Growth Regulators?

    Published on November 7, 2017
    Did you know that pH of the spray solution and air temperature at application can influence the efficacy of some PGRs? We will show you how to save time and money, by monitoring and adjusting two often overlooked factors that can influence PGR efficacy.

  • 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.

  • Understanding how PGRs work

    Published on May 17, 2017
    Plant growth regulators are chemical compounds that regulate various growth and developmental processes in plants, such as seed germination, rooting, branching, flowering, fruit development, dormancy and plant growth habit.

  • 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.

  • Potential Effect of Water Quality on PGRs

    Published on November 18, 2015
    Final spray water pH after plant growth regulation addition varies with pH and alkalinity of your carrier water.

  • Trending: PGR sprenches

    Published on April 17, 2015
    A sprench of a plant growth regulator (PGR) is a hybrid of a spray and a drench application, and is increasingly being used in the production of greenhouse ornamentals.

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