Greenhouse Temperature Management

Temperature controls the rate of plant development and thus, crop timing.  Temperature can also influence extension growth of plants, greenhouse energy consumption, and crop quality attributes.  Additional information on temperature, including crop responses and greenhouse energy consumption, are listed in the articles below.  Additional resources follow.

Resources

  • Evaporative cooling, part 1: Methods

    Published on April 6, 2022
    The only practical way to decrease the greenhouse air temperature is evaporative cooling using a fan-and-pad or fog system. This article provides a short overview of these two systems.

  • Light and temperature responses of bedding plants

    Published on March 10, 2022
    We have quantified the temperature and light responses of common bedding plant crops to better understand their impacts on production time and quality.

  • 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.

  • 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

  • Common plant production acronyms

    Published on May 8, 2020
    This article briefly defines 20 acronyms (abbreviations formed from the initial letters of other words) commonly used when discussing controlled-environment production of plants.

  • The perils of low (greenhouse) temperature

    Published on February 13, 2020
    There can be some undesirable and insidious consequences if the temperature is lowered too much, or for too long. This article describes some of the pros and cons that can arise from low temperatures, especially in the greenhouse.

  • Greenhouse environment checklist

    Published on October 10, 2019
    Every autumn, ensure greenhouse systems that regulate the major environmental parameters are working well and positioned properly. This article highlights many of the control systems and equipment to check.

  • 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.

  • 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.

  • Infrared Thermometers for Monitoring Plant and Substrate Temperatures

    Published on December 9, 2017
    In this article, we will discuss how to use a hand-held infrared thermometer to determine instantaneous temperatures of plant surfaces, root zone or floor heating systems, heat exchangers, and other greenhouse equipment that may have hot surfaces.

  • Bedding plants with high base temperatures

    Published on December 14, 2016
    In the late winter and spring, many greenhouse growers produce a wide variety of species and cultivars, many of which are annual bedding plants. Crops can have different growing and flowering requirements, so plants shouldn’t all be grown the same way.