Hunter Wilson

October 19, 2016 23 min read
October 19, 2016
23 min read

Vapor Pressure Deficit

In this Growers Spotlight we interview Myles Lewis, a researcher with the Arizona Vegetable Company. He has also developed curriculum in conjunction with the University of Arizona. Myles has a Professional Science Master’s Degree in Applied Biosciences.

In this Growers Spotlight, we discuss VPD, an acronym for Vapor Pressure Deficit or Vapor Pressure Differential.

Myles wanted us to preface this article with the following, “I’m not a lawyer, I’m not an attorney, I’m not a CPA.” In other words, this article is for informational purposes only. Growers Network does not endorse nor evaluate the claims of our interviewees, nor do they influence our editorial process. We thank our interviewees for their time and effort so we can continue our exclusive Growers Spotlight service.

To skip to any section within this article, click the links below:

  • What is VPD?
  • The Basics of VPD
  • Integrating VPD Control Into Your Technique
  • The Science of VPD
  • Resources
  • Comments

  • What is VPD?


    Vapor Pressure Deficit (VPD) is an indicator of the evaporation potential of water to the air. It’s a measurement that’s defined as the difference, or deficit, between pressure exerted by the moisture present in the air currently and the pressure at saturation. It’s one of several different methods that you can use to evaluate crop stress or water stress within a plant.


    The Basics of VPD

    VPD is VPD. That’s not really gonna change.Myles Lewis

    Integrating VPD Control Into Your Technique

    If I’m driving back and forth to grandma’s house. I don’t need a Ferrari.Myles Lewis

    The Science of VPD



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    About the Author

    Hunter Wilson is a community builder with Growers Network. He graduated from the University of Arizona in 2011 with a Masters in Teaching and in 2007 with a Bachelors in Biology.